Add trait for recommended feed items
Enable scopes that can check controller params

By passing in self when we execute the scopes, we can use scopes that
scopes the feed items based on controller params.
Update readme to reflect changes in filtering
Delegate recommend, unrecommend and recommended?
Remove recommend and unrecommed
Refactor how we can pass parameters into scopes
Merge pull request #16 from hyperoslo/fix/enable-feedables-to-recommend

Delegate `recommended?`
Remove instance eval and configurable scopes
Merge pull request #15 from hyperoslo/feature/parameters-in-scopes

Enable the use of parameters in scopes
Use a stub instead of monkey patching
Merge branch 'master' into feature/facilitate-for-likes

Conflicts:
	lib/feeder/configuration.rb