SaVi satellite constellation visualizer savi-dev

Adds Antarctica stations.

Fleshing out African locations in fisheye submenu.

First cut at adding a Telesat constellation,
based on their patent application.

Submenus on the location menu, divided by continent.

Minor Karousel script comment update.

Making the Karousel simulation script match their FCC filing.
Thanks to Donald Kenndy for the hint.

Tweaking Karousel back to three loops in the
wrong locations.

Minor tweaks to O3b expansion script comments.

Modifications to improve support for the half-shell deployment
described in Table 2 (p. 4) of the Kuiper technical appendix.
This requires explicitly editing a variable in the script.

Tweaks to Kuiper - 28x28 is last shell, and does not have a partial deployment.