Relay prototype

Considering getting this simple relay implementation into ThaliProject while I finish up the other aspects of it - to simplify folks using the HTML5 seed.   Perhaps into a new branch on ThaliProject - but then you wouldn't be able to see the diff for review.

Only one source file here for the relay - RelayWebServer.java (and RelayWebServerTest.java).  The other bits are all NanoHTTPD.  Open questions on code file headers for those....
There is a much better way to do this, it's a tiny bit tricky but it will take you like 10 minutes and make the world a better place. What you have to do is create a class that inherits from IStatus. Then give it a constructor that takes the status code and description from httpResponse and returns them in the IStatus getRequestStatus/getDescription methods. You can then pass that IStatus object to response constructor. Literally 5 minutes and no more bugs with response codes or descriptions! Please say yes! :)