added kludge to allow rez files to be on Appleshare.
out of 13/RInclude instead of /src/gno/build.tools. This implies that builddate.rez has to have been previously installed in 13/RInclude; this is done by the 'install' and 'release' targets in /src/gno/build.tools.
changed to handle the new *.mk files help.rez: added build date