[Ovmsdev] Revised OVMS.X structure

[Mark Webb-Johnson]

As work is about to start on Volt/Ampera support, I've re-worked the OVMS.X project somewhat to provide a stub implementation.

You'll now see 4 build configs: three start TR and on starts VA. If you want Tesla Roadster firmware, just make sure you choose a config that starts with TR.

I'm now going to start work on the diagnostics lights re-work.

Regards, Mark.