make ss-jade accept locals from serveClient

[lge88]

This make ss-jade accept parameter from res.serveClient(). It depends on the pull:
socketstream/socketstream#341

res.serveClient('main', {
  title : 'main',
  version : '1.0'
});

[paulbjensen]

Hi,

Thanks for this feature addition. I like it, but I'd like to add a way to pass the options so that they are namespaced. I may adjust it so that it looks like this:

res.serveClient('main', {
jade: {
locals: {
title : 'main',
version : '1.0'
}
}
});

The reason for wanting to do this is in case we add a feature that allows passing options to serveClient which are not to do with jade.