liquidProperties, solidProperties: Simplified input

The entries for liquid and solid species can now be simply be the name unless
property coefficients are overridden in which are specified in a dictionary as
before e.g. in the tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek case
the water is simply specified

liquids
{
    H2O;
}

and solid ash uses standard coefficients but the coefficients for carbon are
overridden thus

solids
{
    C
    {
        rho             2010;
        Cp              710;
        kappa           0.04;
        Hf              0;
        emissivity      1.0;
    }

    ash;
}