Add the server info and capabilities to the root resource.
Nearly every client request RBTools makes needs to fetch both the root

resource and the server info resource.
The server info is pretty useful for most clients, especially the

capabilities and version information, so putting it in a separate

resource basically just results in one extra request.
Since the data is cheap and useful, it's now located in the root

resource. The server info resource still exists and mirrors the same

data, but clients can now check the root resource first.

Checked the results of the payload.
Modified RBTools to check the root resource, and saw that it saved

a request and loaded capabilities.
Unit tests pass.