reorder

I'm not sure if you wanted to use tabs with this example but does not seem to be used. 
I've deleted html templates and moved some code, I think is more clear. Below is the detail what I've done.

Deleted html templates as all is rendered at index.html
Deleted friends factory from services.js
Moved MainCtrl to controllers.js
Added controllers.js to index.html
Deleted some commented code

Thanks!