Collaboration Guidelines

## Instructions for Collaboration: - [x] Remove scikit-learn dependency * In order to minimize size and maximize speed of library - [x] Rename the `Internal.py` and `External.py` files to: * `from permetrics.clustering import InternalMetric` * `from permetrics.clustering import ExternalMetric` - [x] Add the necessary files to the `setup.py` file * scipy * numpy (is already included) - [x] Create a new branch called `1.4.0` and put your work there - [x] Allow for different naming conventions when calling various metrics:  - [x] Creation and Formatting of Python docstrings: