[ODE] New test file for Joint PR

[David Walters]

> Since yesterday there was talk on the list about new test files and
> after some discussion with someone trying to use the joint I created and
> after been told twice by David Walters to create a file to display what
> is the use of my new joint (Since he has no idea what this joint is
> doing ;-) ).
>
> I created a test file displaying the behavior of the joint PR.

Thank you :-)   I look forward to discovering the practical uses of
your enigmatic prismatic-rotiode joint!

Regards,
David Walters