Added refrence tankdrive, added arm unfolding fn

Deleted most old tankdrive code for new robot prep
Moved reference code to Brandon's folder
Removed dead files
Removed dead event engine testing files
Fixed header path
Added framework, manual joint controls
Added servo control
Added preset arm control

Also fixed arm jerkiness programming error - problem was that I was
obliderating the speed on every loop cycle when I was checking if the
trigger buttons were pressed.  Now it only does so once by checking the
state.arm_moved variables
Rewrote preset arm control

Changed behavior - not pressing the triggers doesn't unlock auto
rotation functionality - only manually engaging it enables it
Added more presets, servo presets
Changed preset arm values
Added sweep position preset
Added waitForStart, driveSpeed toggle
Fixed upper-arm tremors

I was subtracting arm1_state from arm2_target
Added logarithmic joystick control
Now uses SLOW_CONSTANT for driveSpeed coefficient
Updated README to reflect newbot-conversion merge