Changed variable names in BuildMSM.py for pep8
pep8 fixes in BuildMSM.py
Added convergnece check in MLE BFGS
Fixed BuildMSM test and err checking for MLE
Improved variables names (row and col) for MLE code
Improved latex mle_notes
pep8 fix in MLE MSMLib
Changed C to counts in MLE MSMLib
Changed variable names to row_sums etc