[2.0] DDC-268 - Exchanged DoctrineException for MappingException and added missing exception method (thanks to Christian Heinrich for the patch)

[2.0] DDC-271 - Add columnDefinition for Join-Column in Annotation, XML and YAML driver, updated SchemaTool to use Join Column definition instead of using the column's columnDefinition if specified. Refactored MappingDriverTest to allow for feature specific test-cases instead of one large assertion block. Fixed typos in XmlDriver - Updated doctrine-mapping.xsd Schema File

[2.0] DDC-294 - Added "postConnect" event in Doctrine\DBAL\Connection and refactored TestUtil to allow configuration of DBAL EventManager Subscribers by the use of PHPunit Xml configuration.

[2.0] DDC-289 / DDC-264 - Added a Model and TestCase for OneToMany Unidirectional Assocations using a JoinTable and tested its defining feature (uniqueness).

DDC-282 - Additional assertions to show that use of (bool) for cascade in xml driver is working correctly 

[2.0][DC-460] Refactored cache bulk deletion methods to use driver specific features to retrieve list of keys. Also, refactored tests
so that all methods are tested for all drivers.

Removed:

- Doctrine\Common\Cache\AbstractCache::count()
- Doctrine\Common\Cache\AbstractCache::deleteAll()

API Changes:

- Doctrine\ORM\AbstractQuery::getResultCacheId() now public

Bugs fixed:

- Doctrine\Common\Cache\AbstractCache::deleteByPrefix() was deleting _every_ key in cache

[2.0] DDC-278 - Add missing "columnDefinition" attribute to field tag of XML Schema for Doctrine Mapping.

[2.0] DDC-277 - Remove support "default" option in metadata mappings, but keep it as a concept in DBAL layer to support for example versionable entities.

[2.0] DDC-277 - Remove support "default" option in metadata mappings, but keep it as a concept in DBAL layer to support for example versionable entities.

[2.0] DDC-92 - Refactored Doctrine\DBAL\DriverManager some more in regards to exceptions and added some more test-cases.

[2.0] DDC-92 - Removed DoctrineException from Doctrine\DBAL\DriverManager and replaced with more specific DBALException's