more README

Author: daveray

language-adaptors/rxjava-clojure/README.md

@@ -69,6 +69,12 @@ Blocking operators, which are useful for testing, but should otherwise be avoide
 ;=> nil
 ```
 
+## Open Issues
+
+* The missing stuff mentioned below
+* `group-by`
+* There are some functions for defining customer Observables and Operators (`subscriber`, `operator*`, `observable*`). I don't think these are really enough for serious operator implementation, but I'm hesitant to guess at an abstraction at this point. These will probably change dramatically.
+
 ## What's Missing
 This library is an ongoing work in progress driven primarily by the needs of one team at Netflix. As such some things are currently missing: