[2.0] Code cleanups. Preparations for DDC-193. Fixed DDC-399, type configuration remains global for now but the irritating instance methods on the Configuration have been removed. Use Type::addType et al. Added TODOs for naming standards.

[2.0][DDC-395] Applied the provided patch of Jordi Boggiano removing some trailing whitespaces and fixing missing public keywords

[2.0] Add missing Query::HINT_CUSTOM_OUTPUT_WALKER - it wasn't possible to change the output walker before without extending and overwriting one large method in Query

[2.0][DDC-92] Fixed. Patch provided by Christian Heinrich. [DDC-274] Started some method renaming. [DDC-142] Fixed (join column names and discriminator column names dont support quoting) [DDC-258] Fixed.

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

[2.0] DDC-338 - Changed DQL Parser to comply with ordered collections when they are fetch joined (OMG, thanks to roman and guilherme for the detailed discussion on how to implement this)

[2.0]  DDC-330 - Fix SIZE(collectionValueExpression) using a COUNT(field) to COUNT(*) because in many to many scenarios and with several join columns a COUNT(fieldA, fieldB) would have been generated, which is not valid sql.

[2.0] DDC-135 DDC-177 Implement missing WITH clause, disallow use of ON clause by throwing an exception

[2.0] DDC-320 - Fixed Substring across all platforms using AbstractPlatform::getSubstringExpression() instead of the "hand-built" one.

[2.0] Added DQL Functions and Aggregate Functional Test-Case and fixed two small bugs in DQL Parser that came to light, also it seems that some of the functions are not supported by Oracle and Sqlite and some cases of SUBSTRING and TRIM produce bugs on MySQL.

[2.0][DDC-284] Fixed. API polish and some convention over configuration simplifications for join columns and join tables.

[2.0] Fix casing bug in Parser - IfFunction checks lower-case the function name, but register methods don't.

[2.0] DDC-163 - Missing DQL Alias prefix for many-to-many table in SqlWalker lead to duplicate prefix generation in SQL statement when a many-to-many join table is used more than once.

[2.0][DDC-249] Fixed issue that documentation refers QueryBuilder::select() supports array, but it was only restricted to strings.

[2.0] Refactorings in DQL parser to allow more granular enhancements scheduled for later versions. Fixed issues with missing validations of invalid ResultVariable, Unknown query components and Re-declaration of query compoenents.

[2.0] DDC-176 - Disallow iterate() over fetch-join collections by the means of an exception on parsing the DQL query.

[2.0][DDC-164][DDC-165] Fixed. Cleaned up ManyToManyMapping. Cleaned up identifier handling and handling of composite identifiers in some places.