Adding bitFlipDecoder function which was accidentally left out.

Accidentally left out this function on last commit.

Also the singleParityErrorFix function has been removed. That was more of a learning exercise and is not going to be useful in actual operations.
Removing tests for singleParityErrorFix.

Removing tests for the function singleParityErrorFix since that function was deleted in last commit. Cleaning up the output for the simple bitFlipDecoding tests.