added copy_sample explicitly in intnegbin models
added copy_sample explicitly in intnegbin models

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