Add script to start via mod_wsgi

In our environment it's very convenient to run loggerhead under mod_wsgi. I've adapted a script from Stuart Colville (muffinresearch), added some documentation, and created some example configuration to make this work. The Fedora and EPEL 5 packages I made reflect these additions.

I've emailed with Stuart who is willing to have his script licensed GPLv2+ (I've added the header to his script), can assign copyright, and works for Canonical at the moment. I'll link my branch with the additional scripts