Major changes to mainbox code.
-Added local cache for RFID -> tool permissions
-Queries new page /crm/roboauth/%08x, which gives bitmask of all tool
permissions instead of just one
-Added pid file at /var/run/tooltron.pid
-Now must be run as "tooltron run" and also has "tooltron refresh" and
"tooltron clear" which send signals to the pid in the pid file
-Other things I'm forgetting