* utils/hbmk2/hbmk2.prg
+ Added plans (TODO) for next gen compiler autodetection.
This will surpass currently implemented autodetection in
build system. The basic feature added is detection of all
compilers supported by Harbour installation, so it's not
possible to select one which is not installed, plus more
feedback can be given to user. It also cleans embedded vs
in-PATH compilers and gives an easier way to prioritize
found compilers. This is definitely scheduled after
2.0.0 release, and when I have (more) time.