js.io test action

[desmaj]

Hi Folks,

I just pushed the start of some code that will let us write js.io
tests. I started by writing some tests against the chooseTransport
function. This was helpful, since it was buggy :)

We need lots more tests. Please choose a class or function and write
some tests for it. If you fix a bug, write a test to prove you were
there.

Please also have a look at the test harness (test/run.js). Is it
insane?

I'm going to try to dig up a coverage measuring device so that we can
get coverage metrics for our tests. I'll let you all know how that
goes.

Thanks,
desmaj