Added some support for flash messages
Used partials for flash messages. Added bootstrap js
Forgot to add partial _flash
Added group delete function and dependency deletion in GroupMembership

Admins can now delete groups and the corresponding GroupMemberships
will be deleted
Merge branch 'flash-messages'
Edited table formatting to be more consistent / bootstrap-y

Removed some style-sheet stuff and made tables bootstrap-y
Forgot to change view_organization_charges