Build all opensfm packages at once.
Build all opensfm packages at once.

Summary: Include all python files within opensfm subfolders into the opensfm lib.  This avoids having to put a TARGET file on each subfolder and the consequent issues with __init__.py

Reviewed By: fabianschenk

Differential Revision: D23582060

fbshipit-source-id: ede41d1a7a036ae5dd9453a028f648a4e336b475

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