Add ability to turn off file writing
Add ability to turn off file writing

Replacing the file name after --geojson or --kml with "no" will stop the
output from being written, this also works when using the config file.

For example, this will only output the .kml file:
    archmap.py --geojson no

maelstrom59/ArchMap,guyfawcus/ArchMap,guyfawcus/ArchMap,guyfawcus/ArchMap,maelstrom59/ArchMap