Virtualhome

**New features:**
* Added Procedural Generation Capabilities to allow agents to explore an infinite possibility of unique environments!
* Added 50 more custom designed environments
* Enhanced simulated physics with the environments
* Time management system with synchronized day/night
* New outdoor terrain with accurate sunlight/shadows
* Improved indoor realtime lighting
* More realistic rooms
* Significant performance enhancements, asset optimizations, stability improvements
* Updated documentation
* General bug fixes for existing environments
* Colab demo

* Solved bugs with obj_transform not being updated when taking actions on the graph
* Can now initialize scene with characters on them grabbing objects

* Corrected bugs in segmentation
* Corrected how agent interacts with toilet
* Corrected on relationships for chairs
* Add invisible character

* Corrected with annotation of objects added into the scene
* Corrected how objects are opened
* Allow to change the scale of certain objects

Bug fixes with cabinet objects and how microwave and dishwasher is opened

This release contains:
* Functions to visualize skeleton when rendering a video
* Bug fixes: fixed behaviors when calling render script with `find_solution=True`. You can now turn on the computer under that mode
* Character cameras. You can now add scene and character cameras in the scene. The character cameras will be attached to the characters, and will move with them