Last OpenSfM stable version need opengv

[ThibaudM]

It seems new docker images (python2 and python3) have been published after merging this PR #5.
Removing opengv does not make the docker image compatible with the last OpenSfM stable version v0.3.0 anymore (https://github.com/mapillary/OpenSfM/blob/v0.3.0/Dockerfile).

From my point of view, it would be better to publish new docker images only for stable versions of OpenSfM and let development versions be created manually.

[paulinus]

That is a good point. Also, having this in a separate repo is not very practical. I'll try to move everything to the main OpenSfM repo.
I'll revert this repo to the previous state so that older releases continue to work.
Thanks, @ThibaudM