Updated Metropolis sampler.
Updated Metropolis sampler.


Former-commit-id: 3ae6b86f06463078da4dbfc52cc11b5d96685283 [formerly 65e3f5e4ed5c13774ba0fa3ddc915afd306e9b41]
Former-commit-id: 0dbdabc9191421db508bdccf28389d4bf8c13803
justinbois/bebi103_utils