Add Delete Registration ability
 - backend already supports it
 - Added icon to registrations view
 - added a modal and controller to prompt user before deletion
 - added delete logic
jshint
only show delete option for those with high enough permissions
fix issue w/ PermissionCache
 "View" should be "VIEW"
Move Delete button with other buttons
Merge pull request #199 from CruGlobal/deleteRegistration

Delete registration