[0.6][WIP] More extensions

Replaces the helpers to real extensions, so they don't rely on de helper
files, imho a bit cleaner. Will also make for a cleaner config.
Added a LegacyFacade extensions for 0.5.

TODO:
 - [x] Test it
 - [x] CS fixes
 - [ ] Think about default config

@rcrowe what do you think, or do you like the helpers better?