lio-http-server rewrite!

[deian]

• [x] Finish up LIO.HTTP.Server. Mostly there, see: 0309ad
• [x] Define Show instances for Request and Response.
• [x] Expose Status, Query and anything else you might need to do basic things. 0309ad
• [x] Expose friendly response combinators See this and this
• [x] Build some example servers.
• [x] Controller monad. See this or this
• [x] Pattern-matching routes.
• [ ] Port mustache to lio