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