[Libre-soc-dev] demo of 16/32/48/64-bit LE/BE backward-compatible encoding

[Jacob Lifshay]

I added colors to the demo encoding, hopefully making it easier to follow:
https://libre-soc.org/openpower/sv/16_bit_compressed/demo/

I had to use CSS classes defined in the local.css file to get colors,
since the markdown renderer filters out style attributes but keeps
class attributes.

Jacob