This commit makes it possible to build, document, and test Rocket v0.4.
The main changes are:
* A `Cargo.lock` was added that includes references to yanked deps.
* The `tls` feature isn't tested as `ring` fails to build.
* The site guide was moved to `docs/guide`.
* The `site/` directory was removed.
Here's what works so far:
* The `route` decorator checks its inputs correctly. There's a nice utility
for doing this, and it's working quite well at the moment.
* The `route` decorator emits a `route_fn` and a `route_struct`. The `routes`
* macro prepends the path terminator with the route struct prefix. The
* `Rocket` library can read mount information (though not act on it properly
just yet) and launch a server using Hyper.
