Implement isobaric expansion coefficient for incompressible media

[AxelMatstoms]

Update Incompressible.TableBased with implementation for isobaric expansion coefficient (beta). The value is given by $$\frac{1}{\nu}\frac{d\nu}{dT}$$, where $\nu$ is the specific volume ($\nu=\frac{1}{\rho}$) and T is the temperature. $\frac{d\nu}{dT}$ is found by using the chain rule and the derivative of the polynomial fitting for rho. Previously, TableBased media inherited the partial definition from PartialMedium, which meant the property had no implementation.

This problem is "inherited" from the MSL Media library, so I'm not sure if it would be better to make the changes to the MSL first, then synchronize our copy of the Media library.

[RaphaelGebhart]

Yes you’re welcome to create an issue at MSL GitHub :)

I couldn’t find any component in the TFS that currently uses it, so we can also quickly discuss what you would require it for :).
Because isn’t the isobaric expansion coefficient for incompressible media effectively zero?

[AxelMatstoms]

Updated. Now also implements density_derT_p and density_derh_p. isobaricExpansionCoefficient is useful for example when calculating heat transfer through free convection.

Derivation for isobaric expansion coefficient. $V$ refers to specific volume, $\frac{1}{\rho}$.

$$ \beta = \frac{1}{V}\left(\frac{\partial V}{\partial T}\right)_p = \rho \left(\frac{\partial\frac{1}{\rho}}{\partial T}\right)_p = \rho \left(-\frac{1}{\rho^2}\right)\left(\frac{\partial\rho}{\partial T}\right)_p = -\frac{1}{\rho}\left(\frac{\partial \rho}{\partial T}\right)_p $$

or -density_derT_p(state) / density(state) in Modelica.