This changed the cache structure to allow caching data for multiple
branches. The service still assumes a default branch named `master` but
using the `branch` get parameter, the default branch can be changed.
The 404 page for the missing `master` branch was changed to explain the
new parameter.
The domain name can be set using the `--domain` or `-d` flags. It
defaults to `hitsofocode.com`.
Also the CLI options are now parsed inside a lazy_static context to be
available for the templates.
