Now adding comments to thermo data generated by group additivity.
Now adding comments to thermo data generated by group additivity.

Now we can actually see what group values are used to assemble the
thermo data. This is useful for validation purposes, e.g. comparing with
RMG-Java.

enochd/RMG-Py,faribas/RMG-Py,faribas/RMG-Py,nyee/RMG-Py,KEHANG/RMG-Py,nyee/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,enochd/RMG-Py,comocheng/RMG-Py,KEHANG/RMG-Py,comocheng/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py