Documenting habitat test scenes and pointnav episodes

[srama2512]

Motivation and Context

Documents how habitat test scenes and pointnav episodes can be downloaded.

How Has This Been Tested

Tested locally

Types of changes

• [x] Docs change / refactoring / dependency upgrade
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have completed my CLA (see CONTRIBUTING)
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[dhruvbatra]

This is great, but shouldn’t the information about PointNav episodes (also?) go on Habitat-lab?

[srama2512]

This is great, but shouldn’t the information about PointNav episodes (also?) go on Habitat-lab?

Agreed. Added the PR here: https://github.com/facebookresearch/habitat-lab/pull/916