modified bin/replace.pl in the process of modifying the Makefile
adjusted Makefile:  The project directories have a generic Makefile
	 	    symlinked.  Things are much easier to maintain
	 	    when there is only one common Makefile.

		    The intermittent *clean files are now removed
		    during make.  The obsolete *.j files are not
		    created anymore.  The file name of the script is
		    added as a comment to its first line during make
		    for the *.i files as well so that replace.pl
		    doesn´t need to add them anymore.

		    All this keep things more simple and more
		    efficient ...