SimTk/openmm — pull request #403 by rmcgibbo (2014-04-09 07:35:38+00:00)
Title: units on getPMEParameters

```
>>> import simtk.openmm as mm
>>> force = mm.NonbondedForce()
>>> print force.getPMEParameters()
[Quantity(value=0.0, unit=/nanometer), 0, 0, 0]
```

cc #400