Enhance Geolocation Database to run from memory after Node starts-up

[kauri-hero]

Suggestion - there is a performance aspect to this card because the country information is stored in compressed format. (we don't want the source code and Node binary to be large) Its now around 2.5 Mb

Once, Node boots up, there could be a hashmap in memory which allows searching of the IP blocks to be very performant

Originally posted by @kauri-hero in #388