Allow transportData to be given its epsilon in units of Kelvin.
Allow transportData to be given its epsilon in units of Kelvin.

It is stored internally as an energy, and so is converted from
K to kJ/mol by multiplying by R.

Perhaps this class should be cythonized (the LennardJones that it 
replaces was, and it may be used a lot in the PDep code, I'm not sure...)
enochd/RMG-Py,chatelak/RMG-Py,nickvandewiele/RMG-Py,comocheng/RMG-Py,KEHANG/RMG-Py,faribas/RMG-Py,enochd/RMG-Py,chatelak/RMG-Py,nyee/RMG-Py,comocheng/RMG-Py,KEHANG/RMG-Py,pierrelb/RMG-Py,faribas/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py,nyee/RMG-Py