New version of XML-RPC debugger

[scripting]

I did some work today on the XML-RPC debugger.

Look in the Tests menu. It pre-populates the form with one of the standard tests from the old days.

It's also preconfigured to talk to betty.userland.com, the same server address we used in the late 90s, with all new code, written in JavaScript running in Node.

Should be 100 percent backward compatible. More work to come, but wanted to show this to you all now.

Questions and comments welcome.