This makes the comet mining code actually work. You can now run
king with `new --comet` to mine a new comet and get it on the
network. Mining appears to be significantly faster; I've had to
wait up to 20 minutes with vere, but I've never needed to wait more
than 30 seconds with king.
This performs all normal filesystem operations. We can take
filesystem hash snapshots on startup, write the contents of an
%ergo to disk, send changes to Urbit with an %into, and finally
delete mount points when they are %ogre.
This doesn't deal with updating an initial filesystem on first
run with -A, or with acquiring a lockfile, which should happen
elsewhere.
Can take filesystem hash snapshots on startup, and can write the
contents of an %ergo to disk.
