SaVi satellite constellation visualizer sat-plot-scripts

Fixing syntax errors in path scripts that were preventing
them from working.

Removing duplicate background map/credits from demo. Gah, I loathe perl...

Repositioning .nl credit.

Fixing position of SaVi reminder

Fixing time labelling - first line is space-delimited,
then we convert to number by adding zero to strip newline char.

Adding demonstration of integration with SaVi.

Map improvements, checking files load from SaVi 1.6.

(-file option is a bit clunky - would be nice to fix.)

Minor tweaks.

Testing with xfig 3.2.7 (beta -- but that's what Ubuntu installs)
and fixing problems with use of temp files via path
detection, which is at best arcane in perl.

altering fig generation scripts to use a proper
tempfile in a temporary location.