* refactors majority of user views into class based views
* introduces BaseModalFormView and BaseView for even more generic usage
* renames url identifier user:index into user:detail for more clarity
* refactors user/forms.py by splitting into modals package and regular forms
* regular forms can now be found at user/forms/user.py and user/forms/team.py
* modal forms can now be found at user/forms/modals/...
