Cache bundle refactoring

— Added symfony parameters
— Cleaned up all classes
— Interface reworking
— Standardized statistics
— Dependency fixes
— Source code relocation according to normal practise

Coming soon:
— APC Client
— I hope I will have time to write some tests
— Documentation rework

So far I tested it and it worked really well. Hope I didn't miss any functionality.
Suggest to name this merge request something like 0.2-beta1.