Moved email-related configuration options to new config.ini file
Moved area of interest configuration to config.ini
Moved addchangeset() and email templates to lib
Moved responsibility for local filename under getosc()
Specified ModestMaps 1.4.2 so that PIL is optional
Added option to use cURL when wget is not present
Removed users.json entirely in favor of config.ini
Updated use of set() to modern built-in
Added support for remote GeoJSON URLs
Made Census instructions wording slightly less clumsy
Merge pull request #18 from migurski/master

Configuration and structural changes