Added e-stop, check grip, check prev packet

Added the e-stop, will stop then resume previous command
Added the grip status to the return packet
Added a check to see if the previous checksum was good, and returned the
result of the check
Added code for docking. Not complete. Timeout bad
Cal Byte, Cal while Grip, Pause Switch Bug

Cal switch bug
Sped up cal for cog, rotation protection
Revert "Sped up cal for cog, rotation protection"

This reverts commit 6e8a19bf4e77c8814b0f1cdd63c4a85762d79906.
Arm Changes and Stuff
Something
More stuff
Merge branch 'nick_arm_estop' of https://github.com/OregonStateMarsRover/Rover2014