[2.0] DDC-374 - Implement and tested DriverChain Mapping Adapter
[2.0] DDC-375 - Fix two issues related to DQL Subselects
[2.0] DDC-375 - Fix a test-failure related to the latest commit
[2.0] DDC-375 - Fix a little bug in walkSimpleSelectExpression
[2.0] DDC-375 - Added another test-case for an uncovered branch of subselects in DQL
[2.0] DDC-376 - Fix in XML Mapping Driver 'inheritance-type' attribute.
[2.0] Fixed missing parameter in MappingException::mappingFileNotFound
[2.0] Refactored Doctrine\DBAL\Schema API a bit Table::createColumn() was inconsistent with all the other methods being add*
[2.0] DDC-312 - Revert annoying View and Trigger variables in Schema instance, complete "View" support by just returning a View instance
[2.0] Fixing strict standards notice
[2.0] Adding getDrivers() method to DriverChain
[2.0] Fixing ClassMetadataExporterTask to use existing configured annotation driver for given path instead of re-creating it
[2.0] Fixing php error
[2.0] Adding support for entity aliases in the query language
[2.0] DDC-365 -  Added tests for several missing column types - also showing that decimals come and go correctly into the database.
[2.0] DDC-370 - Fixed bug with CTI and scalar fields DDC-377 - Fixed failing Oracle test
[2.0] DDC-195 - Refactored Mapping Syntax again to be arrays in all annotations, xml and yaml drivers instead of parsing the fields in the AssociationMapping implementations.
[2.0] DDC-195 - Updated XSD Schema
[2.0] DDC-195 - Updated XSD Schema
[2.0][DDC-371] Fixed together with other hydration/initialization issues.