Included ubuntu install script for web app. Added trigger for top 10 trending songs

This bash script assumes a clean Ubuntu 12.10 installation and installs and configures everything required to run the web app. A doc will be made that will include the minimal additional steps to get the zip and actually start the server.

Since I don't know how to place it in production mode, this script just starts it as is (listens on port 3000 on localhost).

Added trigger for top 10 trending songs and shifted buttons around to make more room.