Asteroids bounce off other asteroids
checkCollisions slightly more efficient
Added line segment checking method
refactored dist to util method
fixed vertices check in collidedWithIrrPoly
started line segment collision detection, changed ship to use drawIrrPolygon
line segment collision somewhat working, not taking dir into account
Changed addVec method to take any number of vectors and add rotationPos method
add polar coords conversion, line segment collision mostly working
Fixed line segment collision detection