Changes:

* Change deprecated component.json to bower.json
* Update .gitignore to match boilerplate's one
* Fix typo in app/index.js and re-order aura:style triggering
* Replace old widget terminology with aura_components one. Thanks @fudanchii
* Update templates (package.json, app/main.js, test.js, ... etc)
* _.bindAll doesn't behave as it supposed to do anymore. Thanks @fundachii