[WIP][1.0][FilterManager] Filter manager drop get method. Add ability to configure at runtime.

It is based on https://github.com/liip/LiipImagineBundle/pull/284 PR so please consider reviewing and merging that one first.

To say briefly about changes done and future:

* Remove FilterManger::get method
* Extend FilterConfiguration to support runtime configuration feature.
* Use `Image` instance in CacheResolver::store method instead of Response.
* CacheResolver::store must not return anything.
* ...