Converting a NIMA text file into geojson

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For the Mapping Vietnam project

First download place names from NIMA: ftp://ftp.nga.mil/pub2/gns_data/vm.zip

Unzip the file, which gives us "vm.txt" containing tab delimited data. The file has over 51,000 entries, just what I need! A big data pile!

Field names are on line 1, and they are described here: http://earth-info.nga.mil/gns/html/gis_countryfiles.html