Cmd Option 

Override the command used to restart the application server.  Useful
for coffeescript based applications or on machines where something other
than "node" is used as the name of the node executable (e.g. some distros
of Linux use "nodejs" by default).

Was going to add more robust testing but it looks like there was already
pretty minimal tests.  I have discovered grunt tasks are a pain to test :-).

Fixes #11