Add code comment about Babel decorators w/ link
Add code comment about Babel decorators w/ link

Added a couple comments to explain what is going on here, along with a
link to the decorator addon showing this usage. And changed some code
alignment things to improve visualization.

martndemus/ember-cli-font-awesome,martndemus/ember-font-awesome,martndemus/ember-font-awesome,martndemus/ember-cli-font-awesome,lfridael/ember-cli-font-awesome,lfridael/ember-cli-font-awesome