Getting git of Rfwd and Rbkwd, using facfwd and facbwd instead,
no more division, less operations needed.
I can't do everything in one shot it seems...
Deleting unused variable Rfwd
Use filename-length-max=99

We can replace this with tar-pax if we need long filenames later, but
the default "silently fail on long filenames" automake behavior is
unacceptable.
docs should not be both directory and make target
Merge pull request #60 from SylvainPlessis/zero_fix

Zero fix