CHANGES :   general cleanup, silenced a few warnings, some APPLE related fixes
            added the --enable-commit to fill the COMMIT_BUILD_STRING
            ( an example of a wrapper for configure is provided
              to extract the info about the last commit )
            deleted the outdated _build scripts
            added the _hercconf.sh wrapper for configure ( example only )
            ( but it works on apple and linux )
            added the _bootstrap.sh alternative to autogen.sh ( example only )
            ( but it works on apple and linux )