Mico, MicoRobot, and MicoHand contain meaningless OWD-specific code

[mkoval]

It looks like Mico, MicoRobot, and MicoHand were directly copied-and-pasted from HERB with, in many cases, no modification. There are a lot of HERB and OWD-specific vestiges in these files that don't make any sense on ADA.

For example...

• MicoHand has:
  • `spread
  • ResetHand()
  • GetState()
• MicoRobot has:
  • ExecuteTrajectory() has logic to deal with multiple manipulators and a mobile base
  • a bunch of HERB-specific code commented out
• Mico has:
  • Servo(), as implemented for OWD (is this the same on the MICO?)
  • GetTrajectoryStatus()
  • ClearTrajectoryStatus()
  • SetVelocityLimits()

[mkoval]

Fixed in #97.