changes should allow arbitrary query params

[jchris]

I need to specify a filter for my changes function. I think the first argument should be an options hash so that that can be done. (Also filters can take arbitrary query params, so those are definitely needed.)

I do agree with the default hearbeat and feed setting you have.

[creationix]

I'd like to keep the API as minimal as possible. If you want to do anything custom, the request method makes that pretty easy. I really don't want to force people to use my abstraction methods for every possible use case. I find abstractions leaky as best most the time.

That said, you're welcome to submit a patch for this. I'm not set on the API for changes yet.