wip/grc 1.9 NetBSD

Being overflooded with different logfile colo(u)?ri(s|z)ers, colortails, gccolors, colormakes and similar programs for making text files or outputs of different programs more readable by inserting ansi colour control codes into them, I decided to write my very own colouriser, eventually providing the functions of all those others.

Two programs are provided: grc and grcat. The main is grcat, which acts as a filter, i.e. taking standard input, colourising it and writing to standard output.