[DBAL] Require QueryBuilder for generating

[sstok]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	yes
Deprecations?
Tickets	Closes #290
License	MIT

Require a QueryBuilder is used for Doctrine DBAL, which also ensures ordering is applied correctly. Due too some technical details it's no longer possible to retrieve the generated where-condition, this is now made all internal.

However I do plan to make a few test-helper classes to make testing of conversions much easier.