Make Python boilerplate optional in initial setup

[pjbull]

This makes the project cleaner for other languages, e.g. R, Julia, etc.

[chrisjkuch]

Specifically, remove everything in the module folder that is python specific:

├── {{ cookiecutter.module_name }}                <- Source code for use in this project.
│   │
│   ├── __init__.py    <- Makes {{ cookiecutter.module_name }} a Python module
│   │
│   ├── data           <- Scripts to download or generate data
│   │   └── make_dataset.py
│   │
│   ├── features       <- Scripts to turn raw data into features for modeling
│   │   └── build_features.py
│   │
│   ├── models         <- Scripts to train models and then use trained models to make
│   │   │                 predictions
│   │   ├── predict_model.py
│   │   └── train_model.py
│   │
│   └── visualization  <- Scripts to create exploratory and results oriented visualizations
│       └── visualize.py

should become

├── {{ cookiecutter.module_name }}                <- Source code for use in this project.
│   │
│   ├── __init__.py    <- Makes {{ cookiecutter.module_name }} a Python module
│   │

IF the user specifies that they do not want any Python boilerplate.

[chrisjkuch]

Closed by #286