Merge pull request #3 from sandro-pedrett/dev

change text from model (test)
- setcontroller implement
- constants
- IDatabase implements in DatabaseManager
- test MVC with controlling and modelling, databasemanager
Merge remote-tracking branch 'origin/dev2' into dev2
- add login/register form with html and less
- implement mod_rewrite for apache server with .htaccess
- DB schema erstellt
- footer auf login erstellt
- titel angepasst
- registermodel.class.php bearbeitet (Funktion "checkUserdata" erstellt)
- register for a teacher
- bugfix setController
- add template for default
- error handling
- authentification with test
- new features by errorhandler -> errors can save
- abstract class edit
- bugfix for webserver gemeinsam-lernen.ch

TODO
 native driver installe --> Support contact
- bugfix authentification / login
- database schema
- add journal page
- add new journal
- add new journal
- new journal
-  journal page