symmetry utility added in a folder called bin/
symmetry utility added in a folder called bin/

under RMG-Py's working directory.
The current utility is only working/tested under linux so far.

pierrelb/RMG-Py,chatelak/RMG-Py,nickvandewiele/RMG-Py,nyee/RMG-Py,comocheng/RMG-Py,nickvandewiele/RMG-Py,nyee/RMG-Py,enochd/RMG-Py,KEHANG/RMG-Py,comocheng/RMG-Py,faribas/RMG-Py,pierrelb/RMG-Py,faribas/RMG-Py,enochd/RMG-Py,chatelak/RMG-Py,KEHANG/RMG-Py