New Cozy Drive name, improved synchronization

Improvements for all users:

• The application was renamed to Cozy Drive!
• Deleted files and folders on Cozy are now correctly synchronized on your
  computer.
• An infinite synchronization issue between multiple devices was fixed.
• Network load is now smaller when retrieving changes from the remote Cozy.
• Most useless copies of folders should not end up in the Windows recycle bin,
  the macOS trash or the Cozy trash anymore. Some issues remain though.
• Useless conflicts for trashed files/folders won't happen anymore (this was
  only visible in logs).
• Documentation was updated.
• Some typos in the french locale were fixed.
• We started adding more automated tests to prevent regressions and ensure a
  better quality for future releases.