#549 Fixed
#554 Fixed
#564 Shortened the maximum length of sound filename to 20 characters so it is not too wide
#565 Added pagination to assigned tickets page
#532 Fixed bad days in queue calculation in moderation page
#561 Moved the whitelisting process to a different thread so it does not timeout and users can be correctly whitelisted.
Merge sergio branch to master
Deleted accidentally merge file from sergio branch
Merge remote-tracking branch 'origin/nuno'

Conflicts:
	tickets/views.py
Merging with nuno branch and refactoring some code
Updated moderation guide and moderators link in top bar
Refactorings in uploaded sounds waiting for moderation page
Some more small refactoings in upload screen notifications and sounds awaiting moderation page
Refactored text on sounds awaiting moderation page when there are no sounds awaiting moderation
merging to master