Added means of calculating the equilibrium ratios from the densities of states.
Added means of calculating the equilibrium ratios from the densities of states.

This requires the actual density of states, not the "normalized" versions
passed to each method. The equilibrium ratios are required for proper
symmetrization of the master equation matrix.

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