[Proj] Virtual File Access

[Charles Karney]

On 06/22/2013 01:32 PM, Frank Warmerdam wrote:
>   o Replace geodesic implementation with one from Charles Karney and add a
>     supported public interface (geod_interface.h).
>

Clarification:

geod_interface.h is a wrapper to support the old geod/invgeod utilities.
It presents only a subset of the new functionality; it uses a global
structure for holding the results of geodesic calculations so it is not
thread safe.

Thus the interface which will actually be installed in geodesic.h.  This
interface is documented at

  http://geographiclib.sourceforge.net/1.31/C
  http://geographiclib.sourceforge.net/1.31/C/geodesic_8h.html

   --Charles