Ember Extension Major Refactor

Purpose of this is to upgrade the project from being an experiment to a well-tested app which puts it on the path towards stability.

Added a build process following the same concept used in https://github.com/yapplabs/glazier . Mainly consists of Grunt with ES6 modules

Also moved the actual extension into a folder which will act as the `dist` directory that will be imported by chrome.

This is still work in progress.