added a prototype for metropolis test and changed some stuff in spherical container test
Merge branch 'master' of https://github.com/js850/PyGMIN
Merge branch 'master' of https://github.com/js850/PyGMIN
Merge branch 'master' of https://github.com/js850/PyGMIN
Merge branch 'master' of https://github.com/js850/PyGMIN
Merge branch 'master' of https://github.com/js850/PyGMIN