Allowing users to delete their own cards

Hello @tessr, 

Please review the following commits I made in branch 'prezjordan-deletion'.

06bbd607840f982a0590647e630eb3d7262ea23d (2013-07-28 21:25:21 -0700)
Allowing users to delete their own cards


R=@tessr
VISIBLE_CHANGES=Allowing users to delete their own cards