setuptools compatibility

Just one commit, refactoring the source of clevercss (the 0.2.0, not clevercss2) and its `setup.py` to:

 - Install console scripts (the user currently has to, like, muck around for the path to egg and manually add it to `$PATH`? I dunno how anyone used this as a shell tool);
 - Resolve dependencies (running `clevercss.py` presently just fails outright!);
 - Include test resource files (all tests would fail if installed as an egg);
 - Provide the other console scripts as optional, to resolve their deps at runtime (though they don't seem to have any)

Was a bit of annoyance. You can probably apply nearly all of the changes to clevercss2 if you fix up the deps and change your directory structure.

Cheers!