2016-09-08 聚會手記
hypernu
GNU Guile - GNU's programming and extension language
https://www.gnu.org/software/guile/guile.html
GuixSD - GNU's advanced distro and transactional package manager
https://www.gnu.org/software/guix/
yan
Python ip2location
http://www.ip2location.com/developers/python
Python calculate distance between two locations
http://www.johndcook.com/blog/python_longitude_latitude/
http://andrew.hedges.name/experiments/haversine/