Improved bootstrap, with proper style resetting.
Merge remote branch 'origin/niek_vanalles' into pieterb_conext
minor fix
Merge remote branch 'origin/master' into pieterb_conext
groups changed
Reworked the view system
UNSTABLE
Improved views with bootstrap
Merge remote branch 'origin/niek_vanalles' into pieterb_vanalles
submodule webdav-php upgraded to new version
Merge branch 'pieterb_vanalles'
improved views with surfsara logo
Many changes to the views
Many changes to views and the view system
many changes regarding assertions
Made pages to request a new user account
Made it possible to add a new group
Merge remote branch 'origin/pieterb_vanalles' into niek_vanalles

Conflicts:
	src/beehub_principal.php
	src/beehub_user.php
	src/beehub_users.php
	templates/default.php

Also updated config_example.ini (Pieter forgot to do this)
And removed PROP_NEW_EMAIL, as I don't want to show this internal value to the user