User-friendly VBoxManage wrapper based on https://gist.github.com/lamberta/3270486

install with:
$ sudo make install
uninstall with:
$ sudo make uninstall


Usage: vbox-ctl [options] name
    Easy control of VirtualBox virtual machines.
       -h      Show this usage guide.
       -l      List available VM names.
    Commands:
       -s      Start in headless mode.
       -S      Start in a VirtualBox console.
       -o      Power off.
       -r      Restart.
       -d      Delete VM.
       -D      Purge VM.
    Interactive:
       -n      Create new VM from ISO file.