Improved the user settings.

* added _Member object ...

* added _User object
* added doctest file
* fixed http_req decorator

added and changed form fields, changed mockup import in rest client

Added a function to update the changes made to the list settings and added missing <form>-parts in settings.html.

Created one massive form for the settings page.

Corrected the decorators and started with the settings view and forms.

Bugfixing in the decorators containing mock data.

Separated out the decorators for the mock data in a new file.

Added initial mock data in the rest-client as decorators. Added was data from the database for a list and the possibility to use _http_request with PATCH or PUT.

Changed function names and calls in the view to make it work with the new rest-client. ...

Added the possibility to use fieldsets and divs in forms, by using as_div in the form.

Initial commit, added unsubscribe possibility to Florian's branch.