fix #213, remove requirements engineering documents, they are in the wiki now
Update merge_users.py

fixing user merge
Better wrapping for multiselect, fixes #219
bugfix: delegates can now edit also when they where assigned as contributors without edit rights; bugfix: editors can now add multiple additional contributors
Merge pull request #223 from janno42/develop_

bugfixes: delegates can now edit also when they where assigned as contribu...
fix semester redirect, should fix #226
add missing migration and remove broken workaround, fixes #221
Stupid typo
fix id pattern and id updating when delete, fixes #225
match reminder subject w/ REMIND_X_DAYS_AHEAD_OF_END_DATE
add build status image [ci skip]
fix some breadcrumbs, re #215
fixed redirect bug for contributors who are not editors or delegates
move contributor below course name in results semester detail view - re #228
remove bottom margin which caused the scrolling - re #217
fix counting issue re #225
new try for semester view, re #228
add "..." to some buttons in fsr_semester_view

i always was scared of these buttons.
fix another breadcrumb, re #215
Update validate_unique to current Django internals

Issues was caused by Django upgrading, re #230