re-normalize for numerical robustness
re-normalize for numerical robustness

fivejjs/pyhsmm,wgmueller1/pyhsmm,wgmueller1/pyhsmm,theDataGeek/pyhsmm,wgmueller1/pyhsmm,wgmueller1/pyhsmm,mattjj/pyhsmm,theDataGeek/pyhsmm,theDataGeek/pyhsmm,fivejjs/pyhsmm,wgmueller1/pyhsmm,theDataGeek/pyhsmm,fivejjs/pyhsmm,fivejjs/pyhsmm,theDataGeek/pyhsmm,mattjj/pyhsmm,fivejjs/pyhsmm