Added library for geodetic distance calculation

Not sure about the license. I created the jar from source code and the project has no license file. The file header of the source files says:

/* Geodesy by Mike Gavaghan
 * 
 * http://www.gavaghan.org/blog/free-source-code/geodesy-library-vincentys-formula/
 * 
 * This code may be freely used and modified on any personal or professional
 * project.  It comes with no warranty.
 *
 * BitCoin tips graciously accepted at 1FB63FYQMy7hpC2ANVhZ5mSgAZEtY1aVLf
 */