[2.0][DDC-389] Fixed the PHPDriver that was causing a fatal error when classes uses inheritance type join. Thanks Tiago Ferreira for report and patch.

[2.0] Fixed issue with classmetadata cache that was saving the entire inheritance on the same cacheKey.

[2.0] Fixed issue with classmetadata cache that was saving the entire inheritance on the same cacheKey.

[2.0][DDC-331] Added coverage to CTI not generating valid SQL when fetching for a parent field ona child class.

[2.0][DDC-265] Partial support to inheritanceType in AnnotationExporter. Still needs to add the discriminator column.

[2.0][DDC-265] Partial support to inheritanceType in AnnotationExporter. Still needs to add the discriminator column.

[2.0] DDC-381 - Unserialized Entity that was a proxy during serialize() will fatal when accessing methods that call _load() - A check for the existance of entity persister solves the problem.

[2.0] DDC-353 - Fix UnitOfWork::createEntity and StandardPersister::refresh() not marking created Proxy instances as MANAGED like EntityManager::getReference() does

[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-365 -  Added tests for several missing column types - also showing that decimals come and go correctly into the database.

[2.0] Fixing ClassMetadataExporterTask to use existing configured annotation driver for given path instead of re-creating it

[2.0] DDC-312 - Revert annoying View and Trigger variables in Schema instance, complete "View" support by just returning a View instance

[2.0] Refactored Doctrine\DBAL\Schema API a bit Table::createColumn() was inconsistent with all the other methods being add*

[2.0] Adding DriverChain mapping driver type to allow you to configure drivers to use for certain entity namespaces