Merge pull request #21 from verbunden/interface

Checkbox
Bugfix/newFeatures Usermanager + access control + add pageController
Merge pull request #22 from verbunden/usermanager

Bugfix/newFeatures Usermanager + access control + add pageController
Update README
access conrol Buxfix + error output
Merge pull request #23 from verbunden/buxfixusrmgr

access conrol Buxfix + error output
Update userController.php
Update pageController.php
Update orderController.php
Update articleController.php
Interface Update - pre-Beta