Enable to consider non-constant partial molar volumes provided by tabular data, since the partial molar volume of typical battery intercalation materials shows strong dependency on e.g. lithium stoichiometry. The tabular data is included in the same table as enthalpy and entropy data.

-implement optional partialMolarVolume keyword in table(thermo)
-BinarySolutionTabulatedThermo::interpolate is adjusted to be more general and also interpolate partial molar volume
-BinarySolutionTabulatedThermo::integrate is added since partial molar volumes are often needed in integrated form (integrated over lithium stoichiometry)
-BinarySolutionTabulatedThermo::calcDensity is adjusted since density is not constant anymore and changes with varying partial molar volumes

- Correct several formatting/style issues
- Revert changes introduced in XML converters

- Change the implementation to provided molar volumes instead
  of partial molar volumes
- Extend BinarySolutionTabulatedThermo_Test.cpp to test for added
  functionality
- Add molarVolume data to BinarySolutionTabulatedThermo.yaml
- Edit documentation in header file

- Edit method docstrings in header file
- Change minor formatting issues

- Add description for molar-volume parameter to
  doc/sphinx/yaml/phases.rst in binary-solution-tabulated