Bootstrapping .onions into image and upon boot #247

Allow for detection of .onions into the image (should write out the tor config file).

• Create a runlevels default init.d script which looks for onions in the FAT partition, this should copy them to /var/lib/tor (and set ownership to tor.nogroup) and add a config entry for them. Therefore should distinguish between V2 and V3 onions. This is used for getting in new vanity onions (or previously used onions) by SD card
• Create something similar for updating the TOR file at boot time
• Document how this process is supposed to work (ideally, a directory should be created called torconfig and it should be scanned for directories)

Implementation notes

• Tor Bootstrapping Process