System service scripts

I made some scripts which allow you to run DataBus as a system service on Ubuntu systems. The script install_service.sh will create the necessary directories and copy files. After this script is run, you can control DataBus with "service" commands (start/stop/status/restart), for example:

  $ service databus status
  Wed Oct  2 12:48:06 PDT 2013 | 1 DataBus processes are running
   * DataBus webapp is running
  $

PS - this is my first github pull request, let me know if this is done correctly.