Adding music player to track page + basic structure to Create Competition page

I added a simple synthesizer to 'Create Track' page where you can play it and click 'Save' button to save a track  file to the server. In 'Posted Track' page you can see the saved JSON files. I started using jPlayer for 'Posted Track' page and there are still a lot of styling to be done.

Demo
http://155.98.109.162:68/tracks/new
http://155.98.109.162:68/tracks