1.6 (2012-01-19)
----------------
o Fixed a ConcurrentModificationException problem in lucene index when rotating logs and listing store files.
o Fixes issues #173, #118, #138, #103
o Minor performance optimization in property handling code.
Cypher:
  o Lots of changes to the parsers error reporting
  o Queries can now be pre-pended with which parser version to use
  o Database configuration can now change which version of the parser to use as default

1.6.M03 (2012-01-12)
--------------------
o Added a different aggregation logic. Makes aggregating on the same columns as sorting much faster
o Made it possible to query on array properties
o Fixed bugs #157,#140,#168,#170 and a bug which prevented a node sent in as a parameter unable to be returned in a result
o Added means of introspecting locks taken by the LockManager.
o Added a diagnostics API.
o Added Index#putIfAbsent which ensures uniquely put key/value pair for an entity.
o Added UniqueFactory which gets or creates entities uniquely using Index#putIfAbsent
o Fixed an issue with upgrading an 1.5.M02 store where a "store version" record wouldn't be added and which caused problems after non-clean shutdown.
o Fixed an issue where sometimes dual start entries for a transaction would be added in the logical log.
o Upgraded to Lucene version 3.5.
o Added request timeout, controlled with org.neo4j.server.webserver.limit.executiontime (disabled by default).
  Request header (max-execution-time) can shorten it if specified.
o Fixed issues #113, #166, #172
o Allow overriding of server base url for when test browser needs to access server via a different hostname from the bind address.
o Exposes get-or-create-uniquely via REST in ex. POST /index/node/<name>?unique {...}
o Added shell command mknode for creating new nodes w/o creating a relationship.

1.6.M02 (2011-12-16)
--------------------
o [server] Webadmin data browser now supports cypher queries
o [server] DEPRECATION: Cypher execution is now part of the core REST API, the cypher plugin is deprecated.
o [server] Updated to gremlin 1.4
o [server] Fixed bug in how auto indexes are represented
o [server] Max request execution time can now be limited
o [server] Hypermedia URLs returned by the server now set their host based on the HTTP host header
o [kernel] Lower memory usage of ImpermanentGraphDatabase.
o [kernel] Abstracted stores that stores id/name pairs into AbstractNameStore/AbstractNameRecord and removed lots of duplicated code.
o [kernel] Fixed a race condition in the property cache which cuold poison the cache.
o [kernel] Fixed an issue where a JVM crash in the wrong place would make the next startup rename the current logical log without
  incrementing the logVersion, making the next log rename fail.
o [kernel] Start records in the logical log aren't written until the transaction starts preparing/committing. This fixes an issue
  with the logical log not being rotated sometimes.
o [kernel] Added AbstractGraphDatabase#tx() which returns a TransactionBuilder possible of configuring the transaction to be "unforced"
  meaning that logical logs won't be forced when committing. Means better performance for small non-critical transactions.
o [kernel] Reduced number of proxy object instantiation and node record loading in general.
o [kernel] Added a wrapping graphdb abstraction, which makes instances survive even if the underlying db restarts.
o [kernel] Detached LogExtractor from XaLogicaLog so that it can be used without having a db running.
o [kernel] Added an API for progress indication. With a default implementation that prints dots (every 0.5%) and percentages (every 10%) to a PrintStream.
o [cypher] Added allShortestPaths
o [cypher] Added COALESCE
o [cypher] Added column aliasing with AS
o [cypher] Variable length relationships can now introduce a rel-iterable
o [cypher] BREAKING CHANGE: Changed the syntax for iterable predicated ALL/NONE/ANY/SINGLE to use WHERE instead of a colon
o [cypher] BREAKING CHANGE: ExecutionResult is now a read-once, forward only iterator. 
o [cypher] Fixed problems with optional graph elements


1.6.M01 (2011-11-24)
--------------------
o ImpermantentGraphDatabase now uses purely in-memory structures for speed during tests. It's done on a FileChannel level
  so that every other aspect of the database is intact, just that the bytes end up in ByteBuffers instead of files.
o Fixed an issue with evaluators not executing correctly for the start node of a traversal.
o Fixed an issue with BufferOverflowException thrown sometimes during extraction of prepared transactions.
o Added graph properties, i.e. properties that belongs to the graph itself as opposed to a specific node or relationship.
  Useful for extensions which would like to store configuration and what not.
o Better multi-line support in shell, as well as case insensitive app names.
o GraphDatabaseService#getAllNodes and #getRelationshipTypes @Deprecated and moved to GlobalGraphOperations class,
  where also #getAllRelationships is implemented.
o Added LRU cache for open indexes so that a limit can be set. Thanks vivekprahlad (github id) for the patch.
o When using ImpermanentGraphDatabase RAMDirectory is used instead of FSDirectory. Useful for speed during testing.
o Added a LowerCaseKeywordAnalyzer to use for having an exact case-insensitive index.
o Cypher console in webadmin is now a Neo4j Shell console with the exact same Cypher support included.
o More documentation and examples.
o Made zero length (a single node) as well as optional paths in Cypher possible
o Cypher Skip, limit and regular expressions can now be parameterized
o Column order in Cypher output is now preserved
o Cypher Distinct and order by can now be used at the same time
o Cypher Execution plans can now be pretty printed
o Solved a bug when using multiple regular expressions in the same query
o Added the extract function in Cypher

1.5 (2011-10-18)
----------------
o More useful logging to messages.log to help investigating problems.
o Fixed some issues with detection of version and the need to migrate a store.
o In webadmin: visualization adds nodes/relationships to the view for each search and search is performed with CTRL+ENTER.
o Added DISTINCT to all aggregate functions in Cypher.

1.5.M02 (2011-10-10)
--------------------
o [STORE FORMAT CHANGE] New layout of the property store(s) which results in roughly a 30% reduction in size on disk as well as fewer I/O read operations for reading properties.
o Significant performance improvements for extracting transactions from logical logs.
o Lots of new Cypher features, f.ex: path functions, parameters, shortest path function.
o Icons in the visualization in webadmin and added a standalone webadmin mode.
o REST batch API has reduced memory overhead and more appropriate response codes in case of failure.
o Adding to index via REST has changed to have the value in the JSON body.
o Added simple security and authorization hooks and configuration in the server.

1.5.M01 (2011-08-31)
--------------------
o Fixed file lock issues on an open database which could cause them to be released, making the database vulnerable.
o Fixed several recovery issues which could leave the logical logs in an inconsistent state after a recovery.
o Fixed some data visibility issue for relationships as well as some issues with committing relationships to NodeImpl.
o Auto indexing follows tightly with each mutating operation, not per transaction commit.
o Tighter integration with the manual in a lot of places.

1.4 (2011-06-27)
----------------
o Fix for numerical values not being indexes properly in fulltext index.
o More shell commands for deleting entities from the graph.

1.4.M04 (2011-06-09)
--------------------
o First iteration of the Cypher Query Language included,
  with a section in the manual.
o Experimental support for batch operations in REST
o The Neo4j Manual now includes some examples, and the
  section on REST has been extended.   

1.4.M01 (2011-04-28)
--------------------
o Server logging has been changed, see the Server Configuration chapter in
  the manual for further information.

1.3 (2011-04-11)
----------------
o Neo4j Community now licensed under GPL
o All known Windows problems in Neo4j fixed.
o rewritten Webadmin interface with graph visualization support
o Short string support in kernel for better
o 256 Billion database primitives
o support for Gremlin 0.9 and related Tinkerpop projects
o Better JMX and monitoring support (Neo4j Advanced)
o New backup solution with support for both incremental and full online backup (Neo4j Enterprise)

1.3.M05 (2011-03-24)
--------------------
o New look and feel of the webadmin
o New visual data browser
o Updated to Gremlin 0.8
o Added docs for server plugin initialization.

1.3.M04 (2011-03-10)
--------------------
o All manpages are included in the manual.
o Some fixes to be more Windows friendly.
o Added Dijkstra to the list of graph algorithms to be used when finding paths.
o Support for advanced index queries through REST.

1.3.M03 (2011-02-24)
--------------------

o Numerous updates to the Webadmin tool to make it more usable and to fix some visual bugs.
o Removal of the properties service, replaced with a discovery service to allow third-party apps to bind to the server at runtime and discover what services are offered and where.
o Changed the configuration file format to make it simpler and less error prone (but it is *not*) backwards compatible with earlier versions.
o Separated out the server plugin API for easier development, making only the only development dependency for server a very thin layer and small jar.

1.3.M02 (2011-02-10)
--------------------

o Gremlin updated to 0.7 and trimmed down to bare bones dependencies.
o Webadmin minor improvements in Console, Data browser and monitoring.
o better REST JSON property support in Arrays.
o server started in High Availability mode.

1.3.M01 (2011-01-27)
--------------------

o Full online backup (no need to copy store files before hand) in HA and general support for requests with unlimited size.
o A couple of bugs fixed in lucene index.
o More memory efficient handling of transaction streams (extracting and applying).
o New 'eval' shell command which lets you execute JavaScript on the database.

- Server
o Ability to start the server in HA mode.
o Excludes the neo4j-index component (not used anyhow) to enable HA mode.

- Examples
o Added an example of an ordered traversal.

1.2 (2010-12-29)
----------------

- New components:
o Neo4j Server, including Web Admin
o Neo4j High Availability
o Neo4j Graph Database Monitoring and Management tools moved to its own component
o Neo4j Index API integrated in the GraphDatabaseService API
o Neo4j Usage Data Collection

- Other changes:
o Additional services (extensions) for the Neo4j kernel are loaded automatically or can be injected in a running instance.
o Improved memory footprint and read performance.
o A weak reference cache is now available for high load low latency workloads.
o The old index API has been deprecated (but still included and have been updated to use Lucene version 3.0.1).
o There is a new index API based on Lucene supporting multiple indexes both for nodes and relationships.
o Path algos can now be performed using the shell.

o All known bugs have been fixed. For more details see the individual milestone releases below.

1.2.M06 (2010-12-21)
--------------------

- Kernel
o Fixed an issues with PruneEvaluators getting invoked with the start node as argument.
  PruneEvaluators was never invoked with the start node before the arrival of Evaluator interface.
o Added logging of recovery completion.
o Added TransactionData#isDeleted(Node) and #isDeleted(Relationship) and also made
  the collection to hold these a HashSet instead of ArrayList. This allows fast
  lookups for asking if a node/relationship is deleted in a transaction.
o More flexible caching (can instantiate an arbitrary Cache object).

- Shell
o Fixed a problem where ShellServerExtension assumed the shell was enabled during shutdown, which could result in NPE.

- Lucene-index
o More flexible caching (can instantiate an arbitrary Cache object).
o Merged the fast-writes branch. Basically it makes committing changes to lucene indexes
  faster and more throughput-friendly for multiple threads. The performance improvement
  for committing lucene transactions shows best for small transactions, but will improve
  all modifying operations to lucene indexes.
o Fixed bug which could close an IndexSearcher before it was supposed to when
  there was exactly one item in the result set, two or more threads did this at
  the same time as there was another thread doing an update... AND the reading
  threads all called IndexHits#getSingle() on the result.

- HA
o When a new master is chosen, slaves throws away the id allocations they got from the previous master. This fixes a problem where occupied ids where reused.
o Enabled (and fixed problem with) thread on master which checks for dead slave connections and rolls back those transactions, so that their locks are released.
  This fixes a problem where an HA cluster would seem to freeze up and become unresponsive to write requests.
o Adding Log4j and Netty license information.
o Also closes the executor containing the connections.
o Changed dependency scopes.
o Shuts down databases after verifying them.

- Server
o Bridge OSGi LogService to server Logger. Bundle log messages and stdout pipe through correctly.
o Refactoring of functional tests to remove static dependencies. Introduced a server builder to deal with it instead.
o Can now add performance-tweaking properties to the database hosted by the server. It uses the same neo4j.properties file as the embedded version, but you need to add a property: 
  org.neo4j.server.db.tuning.properties into the neo4j-server.properties file.
o Webadmin: Removed component titles, added save button to data browser, minor change to data browser layout.
o Webadmin: Minor UI updates, added error message that shows up when server connection is lost.
o Webadmin: Moved charts into tabbed box, minor UI updates.
o Fixed an issue with initialization order of things in the server to make sure that RRD is initialized when it is needed.
o Webadmin: Added proper tab-like styling to chart tabs and scale selectors.
o Fixed bug in RRD memory usage sampler, making rounding happen at end of calculations, instead of in the midst of.
o Webadmin: Made 30minutes the default view in charts.
o Webadmin: Added kernel version to dashboard, fixed bug in chart drawing (was drawing when the charts are not visible under certain conditions).
o Webadmin: Disallow self relationships in UI, and show error message explaining this.
o Can now load 3rd party JAX-RS jars from the classpath.
o Updated static assembly to properly include both webadmin statics and documentation. Documentation now tested and ships properly down to neo4j-standalone.
o Webadmin: Made the current node show up by default when adding new relations in webadmin.
o Webadmin: Dashboard shows charts with tabs, and allows switching between charts.
o Added a basic readme with instructions for building, running, and functional testing.
o Updating the way to create temporary files to solve the functional test problem where lots of files stick around.
o re-implemented REST to expose indexing of nodes and relationships (new index API)
o single path algo works in RestfulGraphDatabase now
o fixed duplicate paths for delete node or relationship from index
o Http DELETE requires the proper mediatype to accept
o All indexes must be created to use them.
o Added the ability extend the REST API with server plugins.
o Added back links to the first page in the HTML format.
o updating to Gremlin 0.6
o Updated the component site documentation with the new index API.

1.2.M05 (2010-12-02)
--------------------

-New components
o neo4j-ha, providing high availability

-Important changes, server
o updated to Jersey 1.4
o integrated index is now supported by the shell
o new Evaluator interface improves the traversal API
o support for index hit scores in neo4j-lucene-index
o index caching support added to BatchInserter


1.2.M04 (2010-11-18)
--------------------

o added a server packaging as part of neo4j
o added more configuration options to neo4j-lucene-index
o generating javadocs for all components automatically to components.neo4j.org/{component-name}
o Added ImpermanentGraphDatabase to aid in testing

1.2.M03 (2010-11-04)
--------------------

o Monitoring/management over JMX was moved to the new neo4j-management component.
o Added ability to get the name and configuration of existing integrated indexes.

1.2.M02 (2010-10-21)
--------------------

-New components
o Lucene index, an implementation of the integrated index framework
  using lucene as backend. Planned to replace current index service.

-Important changes
o Fixed shutdown issue regarding UDC leaving a thread running.
o A new index framework integrated into the kernel API.
o Getting relationships is faster due to less cache lookups.

1.2.M01 (2010-10-08)
--------------------

-New components
o Udc

-Important changes
o Index:
   - Lucene version upgraded to 3.0.1
o Shell:
   - Apps discoverable with service locator
   - Added read-only mode on server
   - 'host' and 'config' options
o Graph-algo:
   - Find paths of certain length
o Kernel:
   - Lower memory footprint
   - Higher throughput/concurrency for reads
   - Common interface for loading kernel extensions (f.ex. shell)

1.1 (2010-07-29)
----------------

-New components
o Graph-algo
o Online-backup

1.0 (2010-02-16)
----------------

-Initial components
o Kernel
o Index
o Remote-graphdb
o Shell