(doc) Made travis build the docs.
(doc) Documented IronFurnace.
(doc) Documented Furnace.
(feat) Changed representation of Alloy to hide data storage.
Adjusted contributing readme

Removed merge process paragraph
(feat) Added Request trait, limited by rust-http.
(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.
(feat) Impl'ed iron.smelt.
(feat) Impl'ed Iron::from_furnace.
(feat) Added furnace::new.
(feat) Impl'ed new for IronFurnace.
(doc) Documented new in furnace and IronFurnace.
(feat) Added iron.new.
(feat) Added iron.new.