Add debugging tools to Gemfile.
Make server listen on all ifaces by default.

We can make this configurable in the future (via Runner).
Make the http_router invocation prettier (align).
Make server listen on all ifaces by default.

Later, we'll pass this config item down from the Runner
when it instantiates the Server. For now, its easier to
debug if server is listening on all ifaces.
Enhance the API class

1. Add notes to the #call method (to document possible enhanements)
2. Add a helper function to the base Controller class that all the
   servlet controllers inherit from. This will provide common util
   code to all our controllers.
Rake quality tasks should check rake tasks

Meta!
Enhance the FQDN controller (and add tests)

Add controller tests (model tests are still pending).