Enhancement: Clean up/optimize code

[rmusser01]

Title.
Clean things up before releasing v1.0.

[rmusser01]

Generators - use for large data sets
    Instead of: `data = [process(item) for item in big_list]`
    Use: ```
        def data_generator(big_list):
            for item in big_list:
                yield process(item)
        ```
        ```
        for item in data_generator(big_list):
            # Do something with item
        ```
If you’re creating a list just to loop over it once, consider using a generator instead.
Profiling
    https://www.turing.com/kb/python-code-with-cprofile
Sets/Dicts over lists
    ```
    if item in my_list:
        # Do something
    ```
    Do:
    ```        
    my_set = set(my_list)
    if item in my_set:
        # Do something
    ```