Reconfigured database from sqlite3 to postresql
Removed test2 file
Changed some smaller things
Added Unicorn because heroku prefered this to WEBrick
Tried to add procfile in another place
changed ruby version
Changed ruby version and added some nokogiri
Changed name from procfile to Procfile
Commented away text in test.rb cause heroku complained
Changed rails_admin version, because admin page did not show on heroku
Reconfigured database.yml again
Changed database.yml back