Adding package.json

This sets up npm dependencies
Adding grunt integration

Using load-grunt-tasks to automatically load all of the tasks so that I
do not need to manually require everything.
Adding dependency on koa

Koa will be used instead of express for this project because I want to
test it out and play with it.
Initial koa application

This just sets up data compression, logging and response time
middleware. Fancier stuff will come along later. I should try to write
some tests for this though
Cleaning up the .gitignore

While the formatting is not important now, it will be later when we add
bower dependencies.

Asana: #9722922010659