Laser Controller now reacts to hover (on non-clickable area) as well as drag. The shockwave has been slightly tuned to make the impact look more accurate. Lower upgrade prices.
Merge branch 'refs/heads/master' into hover-laser-controller

Conflicts:
	src/Upgrades.js
Merge pull request #57 from ninjadev/hover-laser-controller

Laser Controller now reacts to hover (on non-clickable area) as well as ...