Made Proxy a super-class of Interact
Split off return_P and (?>=) into MonadP superclass of Proxy
Split off lift_P into MonadTransP superclass of Proxy
Polished source code
Polished source code
Split off hoist_P into MFunctorP superclass of Proxy
Added evalStateT and evalState exports to Control.Proxy.Prelude.Base
Reworked Proxy class to use (->>) and (>>~) as the primitive operators
Polished source code
Updated documentation
Added point-ful versions of Interact methods
Added upper bounds to transformers
Added stdinS and stdoutD to Control.Proxy.Prelude.IO
Merge branch 'master' of github.com:Gabriel439/Haskell-Pipes-Library