Comment 9 for bug 904633

I made a modification to Abhijit's nice gschemdiff wrapper which makes it check for the existence of gafrc och gschemrc in each directory in the sub path in the PROJECTDIRECTORY. This fixes my use case where I structure different parts of a larger project under different sub directories all under a common "schem" directory containing the gafrc and gschemrc. This common schem dir is where I start gschem to edit any schematic under any of the sub directories within, i.e. I can share symbols which are placed under a common sym dir within the git repository.