old-style State class can handle mixtures mostly and phase can be set

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Actually return the value from the PropsSI function

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added cp0 and dpdT|rho for REFPROP backend for use in PDSim

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed order of inputs for update_ph of state class

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added "A" backwards compatibility alias for speed of sound

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Small updates to docs for CMake and buildbot

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Resolved issue with table of contents for incompressibles

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
HAValidation.py now runs

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed pressures for HAValidation

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>