Fixes #27: Don't init widgets when widget settings is blank.
Fixes Readonly show detail error.
Fixes #26 : Use compact AUTH_USER_MODEL
Update editable plugin by ajax load.

Conflicts:

	xadmin/static/xadmin/css/xadmin.widget.editable.css
	xadmin/templates/xadmin/blocks/editable.html
Fixes quickform plugin will checkout formfield when add quickbtn.
Fixes #33 : If it uses an intermediary model that isn't auto created, don't show
Merge branch 'refs/heads/master' into bp3