views/statistics: Fixed /statistics/ page
views/statistics: Fixed indent and removed deprecated code
flask: Inject identity into g, c and tmpl_context
flask/views: Moved /users/ query to blueprint
views/users: Implemented /users/ properly
flask: Use toscawidget middleware wrapper

Recipe from http://adampointer.blogspot.de/2011/02/using-flask-and-toscawidgets.html
views/users: Added /new route
controllers/users: Removed converted tg methods