whonixcheck, timesync: output and startup now the same on Whonix-Gateway and Whonix-Workstation,
since Whonix-Gateway will become graphical as well
build-steps/30_copy-into-img: Removed code for
"Fix permissions for /home/user/.", because we no longer copy files to /home/user.
whonixcheck:
- now using whonix-keys.d folder

whonixcheck / timesync:
- support cli and x at the same time for Whonix-Gateway and Whonix-Workstation
- code refactoring
- no longer required to cd into temporary directory
- better error handling

torbrowser
- no longer hardcoding gpg keys, now using all keys tbb-keys.d folder
- refuse to download, in case remote version unknown
- no longer required to cd into temporary directory
- better error handling
- code refactoring