Adds Stephen Penner to package.json as contributor
Minor improvements to README
* Fixed small JS snipped format
* Added link to Dali Zheng's github profile
Merge pull request #24 from sebasoga/update_readme

Minor improvements to README
Adds Broccoli and moves current code to ES6

Instead of Grunt, we're moving towards Broccoli for building and
testing. It's simpler and is being embraced by Ember itself.

This commit makes all tests pass with Broccoli as server. Plus, code is
now using ES6 modules.