Annotations for Flow Type Checker

In my understanding it would be possible since [Flow 0.4.0](http://flowtype.org/blog/2015/02/20/Flow-Comments.html) to annotate the Flummox API with type information. For Flummox users it would mean that you could statically check with [Facebook Flow](http://flowtype.org/) that you are calling Flummox the right way from your application code. Sounds tempting :-)