Allow query parameters starting with an underscore
Add test for query paremeters starting with underscore
Fix proxy performance test
Merge pull request #735 from FabioBatSilva/fix-proxy-performance-test

Fix proxy performance test
Modified Hydrators to be per-query instances instead of a singleton-like approach.
Kept BC.
Merge pull request #738 from doctrine/VolatileQueryHydrators

Modified Hydrators to be per-query instances instead of a singleton-like approach
Merge pull request #717 from hackedd/patch-1

Allow query parameters starting with an underscore
fix DDC-2579
Merge pull request #739 from FabioBatSilva/DDC-2579

Fix DDC-2579
Synchronized support of FilterCollection with ODM by adding missing method.
Merge pull request #740 from doctrine/FilterCollectionEnhancement

Synchronized support of FilterCollection with ODM by adding missing method
Second cache level POC
First round of refactory
Fix factory method name
refactoring region access tests
basically support for many to many collection
Refactoring tests
store cascade collections
refactoring collections store