Rewrite of framework integration

I order to support Laravel standard restful routing a few changes needed to
be done. A complete refactoring from Framework-Adapters into single tiny
interfaces allowing more flexibility and a cleaner code inside form.

No more Adapaters: All Adapters are removed. A direct Validator, which
acts as an proxy for the Framework-Adapter gas been implemented. Also a
distinct http verb can be set on the form, which will then produce
symfonies _method hidden field.