__version_info__.
* Math.js defines Constants.version and Constants.version_string.
* js-compress.sh includes the version string in the header.
* geod-calc.html and geod-google.html report the version number.
* geodesic.for: add geover subroutine to return version numbers.
* geodesic.mac: define geod_version.
* cgi scripts report the version numbers of the utilities.
* test-distribution.sh: skip making special packaging for MATLAB
  geodesic routines.  Redo way git clones are made to minimize hits on
  network device.