Standard voronoi distribution from http://ect.bell-labs.com/who/sjf/

http://ect.bell-labs.com/who/sjf/voronoi.tar
Apply old patches: input and output format, float -> double
Reindent voronoi code to make it somewhat readable.

indent -kr -i8 -brf
Remove longitude scaling.

I don't think it can work reliably when too much of the other code
does arithmetic on coordinates.
Update documentation to reflect actual output format of this version.