adding nan: noise aware nerf

[NaamaPearl]

Pull requests instruction

1. Put the bibtex in awesome-NeRF/citations/<YOUR-PROJECT>.txt.
2. Modify the README and follow the format TITLE, AUTHOR, CONFERENCE YEAR | OPTIONAL LINK | BIBTEX. For example:

• NeRF: Representing Scenes as Neural Radiance Fields for View Synthesis, Mildenhall et al., ECCV 2020 | github | bibtex

[andybak]

Hi. I've just joined to help maintain the list. Any chance of resubmitting this as there's now conflicts.

[andybak]

Closing this as I didn't get any response.