distfile for 1.5p6 re-rolled

[Michiel Boland]

Hi. It was brought to my attention that the distfile for mathopd-1.5p6
contained CVS directories, which does not make any sense.
So I have decided to re-generate mathopd-1.5p6.tar.gz without the CVS
directories.

Sorry about this. Next time I will be more careful. Remind me to not
do anything just before I go on vacation. :)

Cheers
Michiel