[WIP] update for OFE 1.0rc0

[IAlibay]

Fixes #31 Depends on #24

TODO:

• [ ] Fix IntegratorSettings - needed for 1.0 compatibility
  • [ ] Make a new integrator settings class for NEQ integrator
• [ ] Fix partial charge generation - not needed for 1.0 compatibility
  • [ ] Use OpenFF partial charge generator method to allow for partial charge generation choices
• [ ] Fix solvation settings - needed for 1.0 compatibility
  • [ ] should be just an import replacement
• [ ] Deal with mapping changes - needed for 1.0 compatibility
  • [ ] SIngle mapping validation
  • [ ] Make sure everything is now a list rather than a dictionary
  • [ ] Remove dependency on "ligand" dictionary entry in mapping
• [ ] Making protocols inputs to units - not needed for 1.0 compatibility
  • [ ] Replaces settings as an input - allows for better settings migration

[ijpulidos]

Closing. Superseded by #38