Merge tag 'sprint_09_release_candidate'
Add ROOT.war as required for the lecture
Allow AjaxPrompt to update cmponents when it's finished
FileTag equals and hashCode fix for HashMap.contains()
Add getter for tags of file
Add displaying of tags
Do not display one (pseudo) file per tag
Remove some debugging output
Merge branch 'feature_displayingTags' into dev

Conflicts:
	src/main/java/de/fau/osr/amos/docmatic/FilesDisplay.html
Move files to conventional location
Enforce coding conventions
Allow user to be found by username
Add Test case for registration
Link to registration test
Merge branch 'feature_testRegistration' into dev