Addition of a function an its derivative to compute the mass gas constant 'R' from the state variables d, T and X

- Correction in the calculation of the derivative of the pressure

Change the way the pressure is calculated in the saturationDensity function to be able to compute the density below the triple point temperature

Addition of the parameter "dp_small" to set the threshold to wich the interpolation of the regRoot2 function is performed

-> Changes following an update of the transport model (commit b0bfa906)

-> Changes following an update of the transport model (commit b0bfa906)
-> Correction in the handover of the coeffTimeDer parameter
-> Correction in the SourceTerm
-> Correction in the exchanged power calculation

-> Addition of ghost node to avoid boundary PDEs in the inherited modules
-> Update the HTML description and the images contained within

Correction in the pressure reconstruction. Only the density of the gas phase must be used to compute the pressure

Addition of the regStep function in the Enthalpy flow calculation to reinforce numerical convergence

dp_friction = f(Vel)
dp - dp_friction = d * L * der(Vel)

Correction in the pressure reconstruction. Only the density of the gas phase must be used to compute the pressure.

Removal of the Mass Fractions reconstruction since state vectors are computed and mass fractions are constained in the state vector

Change the values of cp and h_lv in the records following a change in the reference temperature from 0°C to 20°c

Modification in the 'port_a.H_flow' calculation. The smooth operator is use with a continuity at dp=0

Correction of the wrong surface given to the bodyRadiation. Convective surface was used rather than radiative

Replacement of all function using the saturation density by a new function with a new approach to compute the saturation density (see issue#20)

Replacement of all function using the saturation density by a new function with a new approach to compute the saturation density (see issue#20)