Uncomment previous commits code snippet. Looks like Heroku needs it.
Maybe not. See previous two commits.
Change name of application.scss to mobile.scss.
Update files from updated starter kits.
Move files into vendor, try to resolve Heroku issue; uncomment asset precompile fix again.
Remove unnecessary file.
Reorganize mobile file location, remove :mobile mime type, alter prepare_for_mobile method.
Remove missing icon links from footer.
Test: recomment asset precompile fix.
Revert test, looks like Heroku needs it.