Merge pull request #37 from michaelsproul/fix/extensions-update

Update for extensions changes and fix double mounting.
(fix) Fix URL modification and redirect behaviour.
Merge pull request #38 from michaelsproul/fix/redirection

Fix URL modification and redirect behaviour.
(docs) Autogen.
Merge pull request #39 from iron/docs/autogen

(docs) Autogen
(docs) Name and href.
Merge pull request #40 from iron/docs/name-href

(docs) Update crate_name and href
(refactor) Mount is a Handler.
(refactor) Updated examples for new structure.
(refactor) Made Matcher::find cleaner.
(feat) Trie based mounting using the new Iron API.