rm bravo/exocet and use Twisted's plugin loader.

I had to rename some stuff in interface.py to account for some name collisions.

Added a Makefile to make running an uninstalled hamper easier.
Merge remote-tracking branch 'uberj/twisted_plugin_loader'

* uberj/twisted_plugin_loader:
  rm bravo/exocet and use Twisted's plugin loader.

Conflicts:
	.gitignore
	README.mkd
	hamper/commander.py