DQDogs Tutorial

[itsdawei]

Description

Write a tutorial for using cma_mae to generate images of dogs.

TODO

• [ ] Fix dependency on torch_utls and dnnlibs.

Status

• [ ] I have read the guidelines in CONTRIBUTING.md
• [ ] I have formatted my code using yapf
• [ ] I have tested my code by running pytest
• [ ] I have linted my code with pylint
• [ ] I have added a one-line description of my change to the changelog in HISTORY.md
• [ ] This PR is ready to go