add ability to proxy to vagrant or some other machine

[gorangajic]

examples

devurl dev.app.com 192.168.2.10:5000

in this example it should add in the hosts file
192.168.2.10 dev.app.com

devurl staging.app.com staging.com:3000

it should resolve staging.com first and then add that ip address in hosts file

require('dns').lookup('staging.com', function(err, ip) {
  console.log(ip);
});