introduction to usersystem
Merge branch '1.5_template_rework' of github.com:WiReSEP/WireLib2012 into 1.5_template_rework
Basic user functionalities

including:
 * login
 * logout
 * profile
 * self edit

known bugs:
 If the user is on the logout-page and he uses the upper login-button, he gets
instantaniouly logged out.