Addresses routing issue when declaring a path with bindings.

* `Charlotte.Conn` now has a route value
* `Charlotte.Req` now builds the route from the `path` and `bindings`
Version bump
Test fix
`README` cleanup.
First effort at logging.

* Adds `Charlotte.Logger`
* Adds `Logger` to `Charlotte.Handlers.HTTP`
* Adds default logging of begin and finish for each request
* Adds `request_id` to `Charlotte.Conn`
* Adds new dependency `uuid`