Compositor options are not being passed to the compositor.

When `compositor.render()` is called, it is being passed `options.outputOptions`rather than `options.compositorOptions`.

I suspect `options.outputOptions` is a remnant from an earlier revision that was missed when you were tweaking the names for these various properties.

Love the way `node-sprite-generator` is structured - it's made it very easy to extend to meet our needs.  Thanks!