[chirp_devel] Some more VX-6 bits

I've added some extra bits I know about to VX-6 channel memories. I reverse engineered a good part of the VX-6 image format some years ago, but never followed up on it. See http://www.ha19.no/la4rt/vx-6-protocol.html.

The attached patch modifies the memory format in vx6.py, with a separate comment block to explain what's going on. The fields for Power and half deviation should be useful.

I haven't tried to tie the bits up to the program logic.

Regards

Jon LA4RT

Jon K Hellan, Trondheim, Norway