Updated 'please note before uploading' instructions in upload page
Adding ALLOWED_EMAILS to the local_settings.example.py
changed order of requirements in _docs/utilities/requirements.txt
#549 Fixed
#557 Fixed
#554 Fixed
small indentation fix
#528 Fixed
Removing obslete lines and indentation fixes
Cache fixes and omnipresent moderator indicator and first draft of pending sounds page and indicator

Related to both issues #558 and #528
Fixed #558

Call to action for users on pending sound pages, when they should reply
back on a sound ticket.
Show message when there isn't any pending sounds
#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