Feature/cfs pressure outlet
With reference to issue 130, the pressure outlet boundary conditions (reflective and non-reflective) have been modified to allow for the reference static pressure to be set from the VALUE
fields, for instance:
<D VAR="rho" USERDEFINEDTYPE="PressureOutflow" VALUE="0" />
<D VAR="rhou" USERDEFINEDTYPE="PressureOutflow" VALUE="0" />
<D VAR="rhov" USERDEFINEDTYPE="PressureOutflow" VALUE="0" />
<D VAR="rhow" USERDEFINEDTYPE="PressureOutflow" VALUE="0" />
<D VAR="E" USERDEFINEDTYPE="PressureOutflow" VALUE="pOut" />
Additionally the pressureOutletFile boundary condition has been removed as it is now redundant.