small change to armassist.py to ensure correct units with the _set_wf function
added .gitignore file
added application that uses ArmAssist simulator to model the way in which the real C++ ArmAssist application will receive velocity commands and send out feedback data over UDP
added rehand.py simulator, which has no dynamics model but just integrates velocity to update ReHand's (angular) positions at each time step; also added small test script (rehand_sim.py)