ClojureScript support

[philip-healy]

Modifications for ClojureScript support

• Renamed source files to .cljc
• Added cljs printing support for #spy/p, #spy/d and #spy/t
• Atom used for trace storage in cljs (agents not supported)
• Added clj and cljs unit tests. Cljs unit testing supported with doo
• Macrovich library used in macros to determine target environment at macro expansion

Issues

• No colorized/pretty printing support in cljs yet. This can be added later if ClojureScript support? greglook/puget#27 is resolved
• Had to swap out fipp dependency with fixed version for cljs issue: see https://dev.clojure.org/jira/browse/CRRBV-15 and fipp won't compile with cljsbuild projects brandonbloom/fipp#42

[arichiardi]

This is awesome, too bad that problem in rrb still persists. I will try it out in lumo as well but I foresee some trouble.

[dgrnbrg]

Thank you for contributing this!

[philip-healy]

My pleasure David.

The PR didn't include deletions of some of the .clj files. I'll send a follow-on PR to cover this.