pip installation doesn't install tabulate

It appears tablulate isn't being installed when you install glmtools with pip. Code to reproduce the error:

conda create --name test python=3
conda activate test
pip install glmtools

Currently, this installs v0.2.0. If you try to import glmtools you get:

ModuleNotFoundError: No module named 'tabulate'

I think this can be resolved by adding tabluate here: https://gitlab.com/ajquinn/glmtools/-/blob/v0.2.0/setup.py#L62-L68. I think you want to update install_requires to:

    install_requires=['numpy',
                      'scipy',
                      'matplotlib',
                      'anamnesis'
                      'scikit-learn'
                      'tabulate'],

Note, I had a look at the requirements (on the v0.2.0 tag): https://gitlab.com/ajquinn/glmtools/-/blob/v0.2.0/requirements.txt#L6 and it looks like tabulate is listed. However, this is not used when the end user installs via pip install glmtools.