Fixed bug with Comparators. Actually a bukkit bug, it can't safely
remove comparators from code without NBT corruption. Cludge fix is to
change them to signs, then remove them.
Changed pilot tool to always take precendance over sign control, and if
a pilot tool command is processed, it does not process the sign.
Changed Pilot Tool behavior, now it only moves the craft while in
command of the craft, and acts normally otherwise
Added rmove signs, basically the same as the move signs, but they rotate
with the ship
Merge pull request #115 from msummers123/master

2nd attempt to fix a bug with Comparators