Added Fabric deployment script

Tested Deployment on Ubuntu 13.10
Fix for nginx multi-os support bug

fabtools.require.nginx.server depends on deb.package, breaks compatability with other OS families.
Fixes for CentOS deployment
Fix deploy with Non Root

+ Fix pip errors on 12.04 and update django collectstatic
Tested with Centos 6.5
Fix for Fedora(20,19) installation
Added requirements.txt and README.md
Updated README
Merge pull request #311 from mohabusama/master

WebVirtMgr deployment via Fabric/Fabtools