Documentation:
--------------
See https://metacpan.org/pod/Geo::Calc::XS
Build instructions:
-------------------
1. Install the Geo-Calc-XS module if not installed already
2. Extract the Geo-Calc-XS-0.33.tar.gz into directory Geo-Calc-XS-0.33
3. cd Geo-Calc-XS-0.33
4. perl Makefile.PL
5. make
6. make test
7. make install