Translated Python algorithms and comments to English.

[lcgabaldon]

Description

Translated code and comments for the following Python files:

• src/python/binary_search.py
• src/python/binary_search_tree.py
• src/python/binary_tree.py
• src/python/bubble_sort.py
• src/python/calculate_pi.py
• src/python/circular_linked_list.py
• src/python/comb_sort.py
• src/python/counting_sort.py
• src/python/doubly_linked_list.py
• src/python/exponentiation.py
• src/python/exponentiation_recursive.py
• src/python/factorial.py
• src/python/factorial_recursive.py
• src/python/fibonacci_iterative.py
• src/python/fibonacci_memoization.py (I would recommend renaming file to fibonacci_memorization.py)
• src/python/fibonacci_recursive.py
• src/python/insertion_sort.py
• src/python/quick_sort.py
• src/python/singly_linked_list.py

[lcgabaldon]

I believe I have fixed it and committed an updated version. If it is still giving issues I am happy to continue looking into it.