Outer form of merge utility; reads metadata from multiple files.
Copy metadata into the new directory
Call deduplication uniqing to match sort -u.
Not correct, but kind of working!
Don't create empty files.
Fix buffer overflow.
Fix where it didn't go all the way through the zoom levels.
Hook up duplicate suppression option
Merge branch 'master' of https://github.com/ericfischer/datamaps