[PATCH 01/21] ls_colors.c: add $LS_COLORS parsing code

Reusing color settings from $LS_COLORS could give a native look and feel on file coloring. This code is basically from coreutils.git [1], rewritten to fit Git. As this is from GNU ls, the environment variable CLICOLOR is not tested. It is to be decided later whether we should ignore $LS_COLORS

[PATCH 01/21] ls_colors.c: add $LS_COLORS parsing code

Reusing color settings from $LS_COLORS could give a native look and feel on file coloring. This code is basically from coreutils.git [1], rewritten to fit Git. As this is from GNU ls, the environment variable CLICOLOR is not tested. It is to be decided later whether we should ignore $LS_COLORS