[2.0][DDC-354][DDC-425] Fixed. Encapsulated SQL logging better in the DBAL. Added binding types to DBAL mapping types as well as using these binding types in the persisters. Query and NativeQuery now support PDO binding types as well as DBAL mapping types when binding parameters.

[2.0] Refactoring code for reading multiple sources of mapping information from ClassMetadataExporter to a new ClassMetadataReader tool so it can be used to read mapping information easily from multiple different sources. This is used for generating repositories, converting mapping information, generating entity stubs, etc. Generally though, it is useful to be able to read the information for some mapping files into an array of ClassMetadataInfo instances without it being bound to the ORM and the metadata referenced by the EntityManager ClassMetadataFactory

[2.0][DDC-236] Enhanced unique constraints to support names. Fixed general issues on XML and YAML exporters. Fixed issues on XML, YAML, Doctrine 1.X and Annotation drivers.

[2.0] DDC-115 - Proper fix of global namespace problem was in the ClassMetadataInfo, a namespace plus seperator was appended for reasons of shortcuts. However this broke associations in global namespace. Changes to ClassMetadataFactory were reverted and fix plus tests applied to ClassMetadataInfo.

[2.0] Added functionality to convert a Doctrine 1 schema to Doctrine 2 to help users with upgrading. Lots of other small bug fixes and changes.