Add Nonplayer class and instantiation.
Added NPC
Change collision logic to take into account NPC class.
Change collision logic
Change Nonplayer sprite logic
Add to-do item
Add secondary collision check for NPC interaction
Update NPC collision, logic, and generation.
Simplify collision logic and win variables.
Remove comented code
Update collision logic and win variables.
Update app.js
Randomize bug respawn rows
Merge branch 'gh-pages' of https://github.com/aricept/frontend-nanodegree-arcade-game into gh-pages

Conflicts:
	js/app.js
Correct image capitalization
Add Selector throb
Update throb
Update throb
Update throb
Update throb