FIX dream always saved with newly created empty dreamer
FIX broken sort order on dream list (including RSS and CSV)
FIX backward compatibility importing CSV files with tags
changed the sort order for dreams on index page as discussed with BoboTig: make the order work for tons of imported dreams and also for manually created dreams
FIX on user config page, dreamer checkbox list prechecked items
FIX checkbox alignment on desktop browsers for window width equivalent to mobile devices
check write access for cache directories before install
Check unused tags/dreamer AFTER a purge
When importing dreams from, also import the 'author' if it exists in the CSV and as a user in DDb (login must match)
Changed sort order of backup link on import page
Merge branch 'multiuser' of https://github.com/yosko/ddb into multiuser