(cleanup) Removed unnecessary Clone requirements.
(refactor) Refactored Request trait to be more performant.
(feat) Implemented Request for IronRequest.
(feat) Added Response trait, limited by rust-http.
(refactor) Refactored everything to include Response's lifetime.
(refactor) Refactored Response per rust-http limitations.
(feat) Implemented Response for IronResponse.
Merge pull request #13 from iron/feat/request-response

(feat) Request and Response