Tweak app to work with heroky stack

http://bergie.iki.fi/blog/using_composer_to_manage_dependencies_in_heroku_php_apps/
Add reps for heroky
removing proc file to see if that's causing the fail
Added better read me docs for running on Heroky
Added trololol song media files.

Might as well keep them in one place.
Don't track .env, yo