API Change - `Aura/AurConnection` renamed to `Aura/AUR`
Fixed bug in `-Ad`

- Aura determines AUR package dependencies recursively.
  Sometimes deps will appear multiple times in this process,
  and sometimes with slightly different version demands. In cases like these,
  `-Ad` was showing all copies, but without version numbers.
  Now, each dep is guaranteed to only be shown once.
Altered cron guide

- Now it actually works. Turns out the entries need to be added
  to root's crontab, using `sudo crontab -e`.