bugfix + tests

Filters were broken somewhere in 5.1.0

5.1.0: Merge pull request #75 from SilverSnake83/master

feat(filterModifier): Add compatibility of easyFilter in FilterModifier

PK Finder in DELETE

Merge pull request #74 from wollanup/6-0-stable

changes from 6-0 (why 6-0 ? no BC?)

5.0.8: Merge pull request #73 from jpgiannetti-eukles/master

Add join type somewhere

5.0.7: Merge pull request #72 from wollanup/dev

fix CollectionFetch.php

5.0.6: Merge pull request #71 from wollanup/dev

inject Request in ResponseBuilder

4.0.3: Merge pull request #66 from wollanup/develop

Inject Request object in some places

4.0.2: Merge pull request #66 from wollanup/develop

add request in action classes

4.0.1: Merge pull request #64 from wollanup/develop

fix duplicates relation names cause propel to issue a CROSS JOIN query

4.0.0: Merge pull request #63 from wollanup/develop

UseQuery doesn't handle properties anymore, only relations