Improved structure and added example web app

Special thanks to @chrisvariety for the existing Fork to get the ball rolling.

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- [x] Used [generator-ember-plugin](https://github.com/Glavin001/generator-ember-plugin) to scaffold out new structure
- [x] `build/` directory with the library, for Bower
- [x] `dist/` directory for [GitHub Pages](https://pages.github.com/) to serve an example. See http://glavin001.github.io/ember-data.model-fragments/dist/
- [x] `grunt serve` to build and serve example website from `app/` directory (from [generator-ember](https://github.com/yeoman/generator-ember) )
- [x] Examples of working sample web app using library (see `app/` directory)
- [ ] Unit Tests with Qunit (coming soon)