Major upgrade to geodesic support from Charles Karney (#197). 
Syncs geodesic routines with GeographicLib.  Adds geodesic.3 man page. 
geod_* api exposed publically.  geodesic.h is installed.


git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk/proj@2333 4e78687f-474d-0410-85f9-8d5e500ac6b2