Enable to install tome via pip

[mkshing]

@dbolya Hi, this is a PR for pip install.

related: #3

How to publish the package

To publish the package, please follow these steps.

1. If you don't have an account in pypi, create yours in https://pypi.org/
2. Get your API token from https://pypi.org/manage/account/.
3. Set the token to this repository secrets and name it PYPI_API_TOKEN. Please follow https://docs.github.com/en/actions/security-guides/encrypted-secrets#creating-encrypted-secrets-for-an-environment to create a secret in the repo.
4. Once you set the token, you're almost ready. Create whl package on your local by running:

   $ python setup.py bdist_wheel
   $ python setup.py clean --all

   And, you will see a whl package tomesd-0.1-py3-none-any.whl in dist folder.
5. Release your v0.1 via https://github.com/mkshing/dbolya/releases. (see the following image as a example) You can attach the whl package there!
   
6. Done! Github will automatically create an action to publish your package to pypi, triggered by publishat step 5. https://github.com/dbolya/tomesd/actions

[mkshing]

@dbolya You might additionally want to fix README.md and CHAGELOG.md. Please feel free to commit to this branch or happy to do it following your suggestion.

[dbolya]

Thanks for doing this, and thanks for the detailed guide! Looks good to me, merging now.
I'll also publish a release shortly.