john-philipp

### Checklist - [x] I have searched for [similar issues](https://github.com/isl-org/Open3D-ML/issues). - [x] I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip). - [x] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the...

Adding --open-dir flag, hotkeys, many screenshots.

2

See #89.

Feature. Adding --open-dir allows for opening directories directly from command-line. Hotkeys for center and screenshot.

1

Feature. Adding --open-dir allows for opening directories directly from command-line. Hotkeys for center and screenshot.