Lots of debugging for decoder block.

- Adding qa_bit_flip_decoder_ss_test_001_t.alist, an alist file to be used with the QA test.
- Correcting algorithm for reading/writing alist files per email clarification from Dr. MacKay.
- Correcting lots of coding errors.
- readAlistFile moved from LDPChelperFunctions to the LDPC_parity_check_matrix class.
- Moved functions calcSyndrome and haveMatch from LDPCpreprocessing.py to the the bit flip decoder block code.
- Moved function regularLDPCcodeConstructor from LDPCpreprocessing.py to the LDPC_parity_check_matrix class.