termcol: personal 5-bit table shiar32

termcol: personal 5-bit table shiar32

Attempt another type of terminal design, combining features of various
schemes: 12 saturated colours for categorisation (cpc, solarized); 6 hues
each for background and highlight alternatives, half of each desaturated
(1: dark backgrounds like arnegame, 2: rgb indicator backgrounds,
 4: lighter text colours, and 5: prominent markers).