URL alias feature is added
Custome token module is added, required by URL alias feature
Common site home page view feature is updated for sorting content on the basis of rate widget
Path auto and  Target election is removed #29
Path auto for group is added
Merge pull request #41 from tkuldeep/URL_Alias

references #29
A new taxonomy is now attached the the groups content type that helps in creating the kind of URL aliases that we want. A new feature exports these changes and has conflicts with the commons_groups feature, which ideally should have been the case. Let us try not to repeat that in future.

references #37
Only a voting relationship is added to the view but sorting based on this new relationship has not been made a part of the view yet, because of errors. This issue therefore needs more work.