Add npm start command to run default gulp task.

Hey @jxnblk,
Thought this might be helpful. It allows you to just run npm install . && npm start to run the project. In my opinion this makes it a little more consistent with how the node community does things and makes your project a little more agnostic to what tools you decide to use. 

You could change start to be any gulp task though.

Aces.

![](http://www.cutecatgifs.com/wp-content/uploads/2014/09/OrdinaryHonestCockatiel.gif)