Updated README.md. Solved challenge 01-01.
Modified 01-01 into a function.
Added Docstrings.
Fixed formatting.
Updated function to work on bytes rather than binascii functions.
Updated README.md.
Solved challenge 01-02.
Updated naming convention.
Revert "Updated function to work on bytes rather than binascii functions."

This reverts commit 25176b64aed599059e4b552fbd76c5f4bc28434e.
Changed output to bytestring.
Modified function to user binascii methods.
Changed input to byte string.
Changed bytearray to bytes.
Solved challenge 01-03.
Corrected solution to challenge 01-03.

String comparisons were not being done on normalized (ignoring case) strings.
Removed unused character frequency map.
Modified challenge 01-03 into a function and added a test.