go mod

update README (bench scores and code example)

Add goroutines for add elevations to each point in geojson

fmt

remove global variables

remove file reader. hgt-file is open on add to cache and close on rem…

…ove from cache

Revert "processorLineString"

This reverts commit bb82613

Add zerolog for logging. Add goroutines for AddElevation for each poi…

…nt in geojson

Release 1.0

fix printf