CS fixes
Add example use of repositoryClass in YAML
Update annotations-reference.rst

@JoinTable because of mapping defaults does NOT have required attributes. Updated annotations reference to show them as optional.
Merge pull request #836 from Dragonrun1/master

Update annotations-reference.rst
Merge pull request #834 from carlosbuenosvinos/patch-1

Add example use of repositoryClass in YAML
Spelling fix
Spelling fix
Merge pull request #839 from flack/patch-3

Spelling fix
Merge pull request #838 from flack/patch-2

Spelling fix
Add missing link to batch processing chapter
Add 2.4 branch [ci skip]
adds docs
adds support for XML/Yaml drivers
some cs fixes
Make tests forward compatible with DBAL 2.5
Merge pull request #797 from peterkokot/patch-1

CS fixes
Documentation about how to use INSANCE OF in inheritance
Merge pull request #851 from naitsirch/doc/instance_of

Documentation about how to use INSTANCE OF in inheritance
fix relative path to doctrine/common
Fix dependency for tests/Doctrine/Tests/ORM/Functional/ReferenceProxyTest.php