Changed servo_cr, servo_cp, measured_cp, and setpoint_cp to use PoseStamped messages. Changed servo_cv to use TwistStamped messages.

changed package name from raven_2 to raven_2_crtk to differentiate from the standard package

fixed publish_crtk_measured_js so the gold arm is published on the gold arm topic and the green arm is published on the green arm topic and fixed measured_cp publishing gold on green and green on gold

changed EXTRA_ARMS default to 0 for two or fewer arms

changed to default to DV tools on both arms

Add conditional compilation to switch between methods of getting character from stdin
for Ubuntu 20 and older version of Ubuntu

Changed to the new CRTK OperatingState message