Release Name: 6.0.1

Release Notes
The following bugs were fixed in OpenMM 6.0.1:

2005: Missing information from serialized systems
2008: CPU platform segfaults with very few water molecules
2009: Multiple CustomCompoundBondForces on Reference platform produce
wrong results
2010: Integer overflow in long range dispersion correction
2011: Exception in StateDataReporter when reporting speed
2013: PME incorrect when using multiple CUDA or OpenCL devices