fix #422
aggregate reward points redemptions in export and on staff page per user
let database sort user, add the values while generating the dict and use OrderedDict
fix evaj importer script. wrap the whole thing in a transaction and catch less exceptions.
delete evaj importer script. fixes #401
Merge pull request #434 from karyon/delete_evaj

Delete evaj import script
Merge pull request #433 from Nef10/master

fix #422 aggregate reward points redemptions in export and on staff page per user
fix #404 contributor's read-only view of courses: back instead of cancel button
Add translations for buttons and text on semester management (approving, publishing etc.). Fixes #250
Merge pull request #435 from Nef10/ticket/404

fix #404 contributor's read-only view of courses: back instead of cancel button
Merge pull request #436 from PFischbeck/course_selection_translation

Add translations for buttons and text on semester management