GitLab

* Top level Python module is now "openmm"

* Updated module names in examples

* Updated module names in documentation

* Updated module in CI scripts

* Added deprecation warning

* Made ordering of impropers more deterministic

* Fixed typo

* Initial fixes for Apple silicon

Doesn't work yet

* assume vec4 is supported on apple

* Trust the user with env variables

* Fix macos-version-min logic

* Do not alter mass of hydrogens in rigid water

* Do not alter mass of hydrogens in rigid water

* nbthole

* Update charmmpsffile.py

* Update charmmpsffile.py

* Update charmmparameterset.py

fix multiple dihedral with the same periodicity and add a warning reminder for improper dihedral

* add test example for NBTHole

add system files of CYT-GUA-CYT DNA segment for testing NBThole

* Update TestCharmmFiles.py

* Fix errors on Python 3.9

* Revert changes to travis builds

* Updated to latest values for physical constants

* Updated documentation on physical constants

* Updated Python unit definitions

* Fixed constants in test case

* Added a comment