Roboclaw appendage

[argvrutter]

Remaining Tasks:

• setM1M2SpeedAccelDecelDist throws kError/ unknown command

• Add readCurrent

• List all remaining commands

• Official HW testing of all commands

• Individual setting of ticks per rev for each roboclaw

[robobenklein]

• Change the wheel dimensions option to an optional param (cannot be required since in some instances it does not apply.)

[xxAtrain223]

Remaining commands need to be listed here.