add some documentation

add some documentation to the part of code that generates an answers-array mixed with right, wrong answers and asteroids.
Added 3 new images and a mockup of MiniGame

Added some images and a mockup of what I think the mini game should
look like.
Added Force Field to Player and other sounds

Added a force field animation to the main character you can turn on the
force field by pressing y.
no glhf at top of screen force field key is f key
Force Field now only last 5 secs
change asteroid to sprite

change asteroid to a sprite object then render it
Merge branch 'master' into Gabe-testing

Conflicts:
	game/CaptainMath.py