yield/await support in repl/cli #8382

In the version of node 6.5.0 that I am running, the repl does support quite a few things already - which is awesome. One thing I came to miss when trying things out though is that the yield (as often used before await and/or the await keyword. If yield would be available like with co or await would be available like in the concept then async code would become easy to test in the REPL.