Strong typehinting to avoid incorrect constructor params
Fixing incorrect constructor params for PreFlushEventArgs
Using composer autoloader for the test suite
Adding warnings about deprecation of GIT, TAR and PEAR autoloading
Noted prePersist event only triggers on first persist

While probably obvious to a core doctrine developer, a user of doctrine would not necessarily know this without doing some digging
Merge pull request #573 from EvanK/patch-1

[Documentation] Noted prePersist event only triggers on first persist
Added YAML configuration example for "Simple Derived Identity" in "Composite and Foreign Keys as Primary Key" Tutorial
Update docs/en/reference/batch-processing.rst

If you have only $batchSize - 1 rows (amongst other cases), the entities are never flushed, you need a final flush outside the loop.

In the bulk insert you should also need a final flush if the number of entities inserted is not a multiple of the $batchSize.
Revert "allowed to pass filter objects to the configurator"

This reverts commit a9b4debe37370a4ff30141f8e4c6a444c226e06c. See the
discussion on the original PR:

https://github.com/doctrine/doctrine2/pull/434

Conflicts:
	lib/Doctrine/ORM/Configuration.php
[DDC-2019] Add support for expression in QueryBuilder#addOrderBy()
Add php 5.5 to the build matrix (travis)
Merge pull request #575 from naitsirch/master

Added YAML configuration example for "Simple Derived Identity" in Docs
Merge pull request #576 from acasademont/patch-1

Update docs/en/reference/batch-processing.rst
Fixed wrong return types in documentation.
Unit tests: cleaned up outdated / unused / commented out code.
Merge pull request #578 from BenMorel/docfix

Fix for wrong return types in documentation.
Merge pull request #569 from Ocramius/hotfix/pre-flush-event-args-params

Hotfix/pre flush event args params
Fix test failing when memcache extension is installed, but memcache server isnt.
[DDC-2256] Cleanup patch, move dependency on EntityManager out of ResultSetMapping and let AbstractQuery perform the translation.
Merge pull request #570 from Ocramius/cleanup/submodules-removal

Deprecation of PEAR/GIT/TAR autoloading