[01] Modified the gschem Makefile.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
[01] Added an electrical Makefile.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
[01] Added a project Makefile.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
[01] Updated the Extender schematics pdf file.

Signed-off-by: bert <bert.timmerman@xs4all.nl>