Install script doesn't check or setup dependencies

[danlessa]

When trying to use cadcad-cli on a fresh machine using Ubuntu 20.10, I ran into the following error:

>>> cadcad-cli
Traceback (most recent call last):
  File "/home/danlessa/repos/cadcad-org/cadcad-cli/bin/cadcad-cli", line 7, in <module>
    import yaml
ModuleNotFoundError: No module named 'yaml'

I can solve this manually by passing the following command

>>> pip install pyyaml

However, it may be a good idea if the install script solves the dependencies beforehand