Misc. Updates

Due to some ongoing health issues, I haven't been as active as I'd like. Hopefully these will be resolved soon and I'll be able to do some serious work on supporting the extended Ngaro VM, expanding the modules, and further improving the documentation.

For now, a few minor updates:

• I've begun updating http://ngaro.jottit.com using the material from the Retro docs as a base. It can now be edited by anyone, so all those working on Ngaro implementations can contribute.
• jsvm3: An updated version of the Ngaro in Javascript, this is primarily based on an updated I/O model that allows an even closer approximation of the console builds. This is new, and needs testing.