Use Webmachine::Adapters::CryptosphereReel adapter

This pulls in the latest Http Gem from Github, which is needed to support the
additional HTTP verbs Git uses.

It also flips Cryptosphere::App over to using this adapter
Initial Cryptosphere::RequestLogger

Logs requests via Webmachine to Cryptosphere.logger
Initial Cryptosphere::Git::Refs

Support for listing Refs from the built-in Git server. Presently only produces
an empty list for "example.git", but hey, it's doing it through Webmachine.