2013-06-02: Code additions to support cache expiration.
2013-06-10: Code Adds for IPInfoDB v3 API, FreeGeoIP.net API, cache fixes.
2013-06-11: IPv6 in IPDBv3 queries only work for country-precise API calls.
2013-06-11: Remove sample IP2Location binary files if the DBs are already installed.
2013-06-11: Add in v6 API key in class.