Isochore density - energy table EOS

There are different classes, depending on the format of the data to be read.

Density-energy data

type name

rho-e_table

parameters

number_of_densities
For each density:
   density
   number_of_energies
   For each energy:
      energy pressure sound_speed_squared temperature

Specific volume-energy data

type name

v-e_table

parameters

number_of_specific_volumes
For each specific_volume:
   specific_volume
   number_of_energies
   For each energy:
      energy pressure sound_speed_squared temperature