GitLab

* Can use getPlatform() instead of getPlatformByName()

* More concise arguments for getState()

* 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

* Implementation of OPLS through DMS reader

* Improved Implementation of OPLS through DMS reader

* raise errors for invalid implicit solvent settings

Added unittest and 1 system tests. Includes 1 bugfix to resolving a circular import and 1 bugfix where dms wasn't creating the topology correctly when the water was specified in different chains