[2.0] Fixed array tests by removing tests for ArrayCache specific methods from the tests of other cache drivers. Some general API work on the cache interface.

[2.0] Test coverage for OFFSET AND LIMIT sql generation for all platforms and Query class with setFirstResult() and setMaxResult()

divided some assertions in various cohesive methods and renamed method names to conform to agile documentation (affects #2316)

[2.0] New Annotation API work: Simplifications, changed namespace separator to match the one of PHP, adjusted Lexer to swallow any * characters outside of a string value to be more forgiving when it comes to formatting.

[2.0] Moved cache drivers to Common package. Added new annotation parser implementation to Common package. AnnotationDriver in ORM not yet migrated.

[2.0] Fixed issue with self-referential one-to-many associations not being persisted correctly when IDENTITY key generation was used. Included now passing OneToManySelfReferentialTest.