1) update of tests
    - adjust model factories to new Factory-Boy
    - enable login system for recent Flask-Login (disabled by default
      for tests)
    - obtain CSRF token from login form using Flask-Fillin (old method
      didn't work anymore)
 2) update of forms imports for new wtf
 3) update all dependencies

  1) update of tests
     - adjust model factories to new Factory-Boy
     - enable login system for recent Flask-Login (disabled by default for tests)
     - obtain CSRF token from login form using Flask-Fillin (old method didn't work anymore)
  2) update of forms imports for new wtf
  3) update all dependencies
  4) flask.ext.<name> -> flask_<name>