feat: data importer
feat: data importer

Summary: Adds a save_exif_overrides

Reviewed By: mlopezantequera

Differential Revision: D34303071

fbshipit-source-id: b44625ad9807d8f6679505789c43ceb4b8fddd7c

mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM