Added standalone server support.

Useful if your site runs in an environment where graphviz is not available.
Switched server to use cherrypy wsgi server.

This adds an external dependency, but handles connections much better.
Added django debug toolbar support.

This can be used instead of the middleware (panels
are themselves middleware).
Added --daemon support to run.py.
Merge branch 'server'
Added debug toolbar support for the non-server mode.
Added example settings for django debug toolbar integration.