#104 nicer form for approve, lecturerready, publish
Merge branch '104_lv_formular'
#104 added state of course to label in approval form
Merge branch 'master' of https://github.com/MaKoLine/EvaP into MaKoLine-master
DRY refactoring for the course selection form

During the lifecycle of the evaluation, a student representative can
at several points move multiple courses forward to the next stage
(prepared, approved, published).

This happens to improve the usability of the web front-end and to
reduce the number of emails sent to the bare minimum.

The forms used for this en-bloque course management are nearly
identical and are DRY refactored by this commit in order to have a
single code base.
Merge MaKoLine-master which fixes #104 and resolves #129