Knockback added
Prep work for the electrode, lots of punctuation fixes along the way
Electrode enemy added.
Cruise missile collision handling fixed.
Cleanup in the cruise missile file.
Preparations for prog spawning made
Merge branch 'master' into enemies-ernir, four conflicts

Conflicts:
	Player.js
	entities/Brain.js
	entities/Hulk.js
	managers/entityManager.js
Function missing from the merge added again
And one more tiny little post-merge fix. (Brain positions)
Scoreboard re-inserted after merging derp.