Extract feature toggle library from bundle

[sagikazarmark]

Possible competitor: https://github.com/qandidate-labs/qandidate-toggle-bundle

Downsides: It is unnecessarily complex.

[elbcoast]

Absolutely. Splitting this up into three different packages makes sense: One for the library, one for twig related stuff and one symfony specific bundle which will also contain the annotation logic for the controllers.