Add the rest api port to vagrantfile's port_forward

What do you think about adding, the rest api port (4243) in the Vagrantfile port_forward ?

Like this the client in your host can connect to the deamon in your vm, with no further configuration.

In my case, I compiled docker on OS X, so (once the ppa will include a version of docker with the rest api) I can do :

    $>vagrant up
    $>docker images

And it'll list docker's images inside the vm.