Make gramework installable as an npm package

This allows a few things:

* For gramework to be published as a package on npm
* For easy integration with a project
* Enable gramework to be included in package.json "dependencies" for automatic installation when running npm instal

I have not published this yet, pending your approval, but otherwise using gramework would now be like so:

Within your project:

    $ npm install gramework

Then, in your code:

     var animate = require('gramework').animate;

Simple as that! I have also included some documentation in the README on how to pack the npm package locally, so you don't have to publish constantly if adjusting the gramework code.

I have *not* included many of the existing gramework modules, apart from animate and camera, as they require some work before they can be officially included.