Fixes Strict error on EntityPersisterMock.

First tests for basic collection implementation. First experimental use of closures (Currently commented out, because the svn server makes a syntax check against 5.2.x).

added missing annotation driver class. small refactorings. added first ClassMetadata serialization tests.

Fixed paths that were referring wrong namespace resolution.
Implemented more Parser and AST classes: JoinVariableDeclaration and Join.
Fixed wrong semantical checks of IndexBy grammar rule. They should be in IdentificationVariableDeclaration and JoinVariableDeclaration.

Fixed wrong DQL in IdentifierRecognitionTest.php

Started refactoring in DQL parser to separate Production into Parser and AST classes.
Finished first tests. Currently only 4 are active in IdentifierRecognitionTest, and only 2 are passing.