Removed CoffeeScript added Bower.

CoffeeScript support seems like a half baked idea in Jekyll. Trying to
combine bower plugins with CoffeScript files was a real pain in ass.
What I was able to get working felt hackish. I’m converting code to use
straight-up JS because it feels right. Maybe once Jekyll support
uglification, I re-consider my setup, but for now, I’m good not using
CoffeeScript.