Cosmetic changes inside some files and add some (php-documentor-) comments.
Merge branch 'master' of github.com:LEPTON-project/LEPTON_2
Merge branch 'master' of github.com:LEPTON-project/LEPTON_2
Merge branch 'master' of github.com:LEPTON-project/LEPTON_2
Bugfix inside account/preferences_form.php. add missing require_once.