Tests use typescript

[gugu]

Tests switched to ts.

1. PR includes async cache changes for now
2. I did not add types for the request module - we need to remove this dinosaur instead of adding types to it

[cjbarth]

I'll review this when the cache code is merged and this is rebased on top of it.

[gugu]

@cjbarth done

[cjbarth]

I found some simple things that need adjustment. I've also prepared some changes and pushed them to clean up the testing framework.

[cjbarth]

I've merged in the head of master, but didn't get a chance to clean everything up.

[cjbarth]

There are some tests that fail intermittently, I think because we have a test-interdependence. So, when Mocha runs the tests in random order, some tests occasionally fail. Other than that, I think this code is all better. I would love someone to take a look at the intermittent failures.

[gugu]

@cjbarth done. PassReqToCallback test modified shared config variable

[cjbarth]

This all looks good. I think we should probably make a follow-on PR that removes all the deprecated code and converts tests that use deprecated code to use the newer code.

If you feel it looks good, either one of us can do a merge commit (though I would clean up the comment because it is a little crazy now :) ).