* Native job/channel support with asynchronous API.
* Run tests asynchronously.
* Provide global :CljEval and :CljsEval commands.
* Softly deprecate :Piggieback in favor of :CljEval (whatever/cljs-repl)
* Use ClojureScript for cljc files if REPL initialized.
* Replace Nashorn ClojureScript REPL default with configuration option.
* Provide :SpecForm and :SpecExample.
* Replace automatic stacktrace retrieval with :Stacktrace.
* Extract bulk of plugin file to autoload file.
* Use explicit clojure.core in all evals for improved robustness.