Change xbmc.python req. to 2.1.0

Change xbmc.python req. to 2.1.0 to be in line with Gotham and Frodo needs
Changed Icon to a higher-res, square image.
Updated Description to add a link to this repo
Merge pull request #1 from ProgressiveThinkin/master

Change xbmc.python req. to 2.1.0