Reverse geocoder enhancements#51

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sefitz wants to merge 3 commits intothampiman:masterfrom

Commits on Aug 19, 2019

support init non-singleton instance of RGeocoder to support different stream simulatenously
sefiotonomo
committed
fixed query_dist reutrned distance + fixed printing in extact
sefiotonomo
committed
fixed error message when different csv header is loaded
sefiotonomo
committed