SaVi satellite constellation visualizer savi-dev

First take on setting sphere color in Geomview.

Simple attempt to turn off map if it's no longer Earth.

Tidyup and supporting horizontal graticule on spherical,
a la cylindrical. Shaping vertical is just too hard.

Noting graticule option in manual.

supporting cylindrical view (-all-maps) in graticule.

Adding in graticle menubar option.

Minor graticule code tidyup.

Adding support for graticule (lat/long lines).
Will be useful when no map is available,
showing coverage in Geomview.

Have not attempted cylindrical at this point,
so unprojected and unprojected mask only.

Improving packaging notes.

Packaging is a textfile, tellin svn it is with
svn propset svn:mime-type text/plain PACKAGING
svn ci