Update README.md

Added merge sort and quick sort

Added merge sort

Added quick sort

Added specific highlighting for heap sort.

Updated help_me

Updated readme.md

Added counting_sort with included docstring

Added docstrings and commented heap sort

Updated readme and the help_me function to include Heap Sort

Added heapsort, and functions required for heapsort

Bug fixes

Wrote README.md, docstrings and added comments to sortingvisualized.py

Sped up Coctail Sort

Added Coctail Shaker Sort