Closes #309: account for helix group rotation properly in oxdnaoxview export#310

DanielHader wants to merge 8 commits intodevUC-Davis-molecular-computing/scadnano-python-package:devfrom

309-account-for-helix-group-rotation-properly-in-oxdnaoxview-exportUC-Davis-molecular-computing/scadnano-python-package:309-account-for-helix-group-rotation-properly-in-oxdnaoxview-exportCopy head branch name to clipboard