Makefile now cleans all files within docs/*/; rebuilt docs.

modified:   Makefile
modified:   docs/man/man1/gx.1
modified:   docs/man/man3/PSON.3gx
modified:   docs/man/man3/Test.3gx
modified:   docs/man/man3/gx_init.3gx
modified:   docs/pod/ProcSet/PSON.pod
modified:   docs/pod/ProcSet/Test.pod
modified:   docs/pod/ProcSet/gx_init.pod