GitLab

Summary:
A few small website updates:

- changed the tutorials to point to the `stable` tag on github so we don't have to update the website each time we want to run them!
- changed the colab button
- re ran notebook cells to update the images for textured meshes

Once these fixes are landed I can build and publish the website.

Reviewed By: bottler

Differential Revision: D20484836

fbshipit-source-id: 603a05e752f631c60d1a3abb9adeb1b9b451ab98

Summary:
The missing single quote makes you unable to directly cope the line if code into Colab
Pull Request resolved: https://github.com/facebookresearch/pytorch3d/pull/23

Differential Revision: D19791643

Pulled By: nikhilaravi

fbshipit-source-id: 2aa043ad4163eb7146c7b8b00bd8846ae61d8009

Summary:
Set up landing page, docs page, and html versions of the ipython notebook tutorials.
Pull Request resolved: https://github.com/fairinternal/pytorch3d/pull/11

Reviewed By: gkioxari

Differential Revision: D19730380

Pulled By: nikhilaravi

fbshipit-source-id: 5df8d3f2ac2f8dce4d51f5d14fc336508c2fd0ea