Revert "adding ui for usergroups and permissions"

This reverts commit 17728be0ad5c1b68c9d2a701565f9e03781c3207.

Conflicts:
	wsgi/static/siteserver/js/ac_usergroup_permission.js
	wsgi/static/siteserver/js/ac_usergroups.js
	wsgi/static/siteserver/templates/ac_usergroup_permission.html
	wsgi/static/siteserver/templates/ce_account.html

Removing usergroup UI and permissions which were unintentionally included on this branch
manually removed usergroup templates which are supposed to be on a different branch