DDC-515 - Enhanced Validate-Schema-Command, integrated it with CLI and besides mapping<->database checks also do consistency checks of the mapping files

Also added a new testcase

Conflicts:

	lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php

Removed EntityTransaction until it has a real purpose. Added the affected entity to OptimisticLockException. Updated functional optimistic locking tests accordingly.

Renamed fetchRow to fetchAssoc, as defined in @todo list. Renamed getRollbackOnly to isRollbackOnly, since it is more consistent to its purpose.

Revertd partially the support to DBAL\Transaction, it was wrong. Fixed implementation of ORM\EntityTransaction and fixed tests.

Added tests for 41e830ca, thereby finding two issues with XML and YAML Driver handling of Sequence-Generator

[DDC-552] Fixing issue with getReflectionClass() not existing on ClassMetadataInfo when it is required by AnnotationDriver

DDC-545 - Add unittest for all drivers uniqueConstraint capabilities, fix bug in XML Driver that disallowed using them

Fixed svn dependency in build file and some weird issues where the oci8 driver loses spaces in the sql while transforming positional to named parameters.