better documented


Build-tools/Do-compile:
   - Removed some obsolete pieces of code (get rid of using rsh and rcp)
   - Added some code comments
   - Reworked help text to match the options available
   - Heavily reworked GetOptions, removed some obsolete ones and joined others
   - make_options and config_options can now be given multiple times
   - simplified code that added configure options dependent on given options