Define rename + Joystick improvement

Defines are now more descriptive.
Using writeMicroseconds to set servos
Using map() function to allow speed to be set more effectively
New code for the roboturret with gun mount

Updated version of the roboturret joystick code
-button directly controls pin 7 (instead of toggling pin 2)
-2-level analog input allows for fine control near center of joystick
and faster control towards outer edges
Fixes to Roborealm files