Do you accept a patch to make this library work for ClojureScript?

[lucywang000]

Hey, thanks for a lot for this library. I find the letr and loopr not only useful in clj, but also in cljs. It improves the readability of some code quite a bit. Would you be willing to accept a PR for adding cljs support?

I think it would basically involves these changes:

1. make the macros in src/core.clj file able to generate cljs-specific code, e.g. IllegalArgumentException for clj and js/Error for cljs. Also the :via :iterator specific code could use the js Symbol.Iterator protocol.
2. make the test/core.clj file into .cljc format, and use reader conditionals to only execute threadpool related code (bounded-pmap etc.) in clj.

[lucywang000]

Here it is #3 :)