Add bind_uri and options attributes

Adding two attributes to specify `bind_uri`, a binding location (like 0.0.0.0 instead of the default localhost, or another port instead of the default 4243), and `options` to allow additional things to passed to docker, like `-api-enable-cors`.

I'm new to docker but these were two things I needed to get [dockerui](http://github.com/crosbymichael/dockerui) up and running.