Counting Point Mutations (refactor)

Refactored code for readability and reusability.  Improved performance
with imap.
Mendel's First Law (refactor)

Refactored code.  Improved docstrings and notes.
Frequent Words with Mismatches Problem (refactor)

Refactored code for improved readability and performance.
Frequent Words with Mismatches and Reverse Complements Problem (Refactor)

Refactored code for increased readability and performance.
Script: Hamming Distance (refactor)

Replaced map with imap for improved performance.