Only print geojsonio import error msg if needed
Only print geojsonio import error msg if needed

The geojsonio import error message was printed if the module failed
to import, now it only prints if you try and use the feature
without the module.

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