Fixes in ParserResult, which was generating a bad table alias. Added more test cases. Commented new Event system call in EntityManager. Fixes in RangeVariableDeclaration.

--no commit message

Changed Doctrine_Query to accept a Doctrine_EntityManager instead of a Doctrine_Connection. Updated Doctrine_EntityManager. Updated test cases and included one new passing test case for SELECT generation. Fixed whitespace bug in DELETE and UPDATE statements.

Finished first parts of SELECT support. Two test cases added and passing. Introduced the concept of DCTRN in queryComponent. Added concept of queryField, which validates for already defined fields in SELECT.

Merged all identity maps into one in the unitofwork. identity map now properly works with hierarchies.

Refactorings along with a speed improvement on the Hydrator when processing joined resultsets. Other minor tweaks.

Ported fix for #929 from 0.10 to trunk. Testcase needs to be ported later since the behavior implementation is not useable in trunk atm.