Merge pull request openmm#2477 from peastman/7.4_branch

Updated version number to 7.4.1

Merge pull request openmm#2477 from peastman/7.4_branch

Updated version number to 7.4.1

Merge pull request openmm#2376 from peastman/methodmap

Force generators that don't use PME still accept it as a nonbonded method

Merge pull request openmm#2275 from peastman/7.3_branch

Fixed compilation error on Windows

Merge pull request openmm#2205 from peastman/setstream

Fixed potential uninitialized memory error setting up PME stream

Merge pull request openmm#2065 from peastman/722

Updated version number to 7.2.2

Merge pull request openmm#2006 from peastman/version

Updated version number to 7.2.1

Merge pull request openmm#1993 from peastman/7.2_branch

Fixed errors in LJ interactions with CHARMM36

Merge pull request openmm#1977 from peastman/charmm

Fixes to CHARMM36 force field

Merge pull request openmm#1967 from peastman/ff

Added link to openmm-forcefields in the manual