Add uWSGI module

uWSGI is an improbably-modular and excessively-configurable something-or-other;
it is the Alpha and the Omega. Its command-line arguments are turing-complete.
Humans beings typically use it in conjunction with Nginx as a multi-worker web
application manager for Python apps, but only because we have limited
imagination. Let the wings of uWSGI soar.

It already runs Graphite, and needs to be able to run Gdash as well. Might as
well turn it into a proper module.

Change-Id: Ica2c5566af97d9e75394d04e1fc442121841dedb