Servo power

The next part of the puzzle is going to be solving for the battery and power system for the servos.  I just got out a multimeter and tested the current draw.  While moving under no load the servos draw between 150 and 200 mA.  When not moving the servo blips on and off at around 10 mA.  Applying a resistive force to the servo causes the power consumption to jump up to it max of around 500 mA, depending on the amount of force applied of course.  Since this robot has almost no real resistance to apply to the servos, I'm going to generally assume around a 250 mA working draw.

Side note:  I've fixed a couple of bugs in the github repo.  If anyone actually uses the library and encounters any more, let me know.