(cleanup) Rename Iron::around to Iron::new to avoid confusion with AroundMiddleware.
(feat) Eradicated Option::unwrap.
(doc) Documented lib.
(doc) Documented Handler.
(doc) Documented BeforeMiddleware.
(doc) Documented AfterMiddleware.
(doc) Documented AroundMiddleware.
(doc) Documented Chain and ChainBuilder.
(cleanup) Re-export Error.
(cleanup) Updated examples for new Iron.