Moving encoding/decoding functions to seperate files.

Moved function matrixMultiplierEncoder to LDPCencoding.py

Moved functions singleParityErrorFix and bitFlipDecoder to LDPCdecoding.py
Moving encoder and decoder functions out of this file.

Deleted encoding and decoding functions from this file; they have been moved to new files LDPCencoding.py and LDPCdecoding.py.