created if app and IfUser model
remove direct reference to TimtecUser
Merge branch 'user-reference-refactor' into if-signup-3528
created custom signup form
working signup form, with validation
custom IfUser admin to edit added fields
fix timtecuser model; remove custom login view
fix if model
Merge remote-tracking branch 'origin/master' into if-signup-3528

Conflicts:
	core/models.py
adds if_staff field
remove all TimtecUser from core models
Merge branch 'master' into if-signup-3528

Conflicts:
	accounts/models.py
	if/models.py
merge issues
fix pep8; adds loginform example and signup completion stubs forms