fixt import addon versions for Gotham alpha10

fixes the xbmc.addon version to 12.0 and script.module.simplejson version to 3.3.0
not cdartmanager can be installed in gotham alpha10
NOTE: you have to correct your script.module.pil.
i've corrected it on xbmc git.
Merge pull request #21 from Rah85/patch-1

fixt import addon versions for Gotham alpha10