To run my stuff just attach the base unit text to Unit,
add the Unit script to Unit, then add the Builder, Miner,
and Welder textures to their variables in the inspector
for the Unit script.  For now, the Build, Mine, and Weld
actions when you click on a unit just increments the skill
level for that action.

Signed-off-by: Jeff Einhaus <jse34@case.edu>