These properties are actually infinite in the two-phase region, but attempting
to compute them by finite difference would incorrectly give a finite result, so
they need to be treated as a special case.
Calculating specific heat capacities (cp or cv) for states near the saturation
curve would give incorrect results if the finite difference method used points
within the saturation region. To avoid this, we now check the points used for
computing the properties and use values outside the saturation region to compute
the derivatives.
Fixes#273
TPX_Error is now derived from CanteraError, and errors in the tpx calculations
propagate automatically without requiring explicit checks for an error
condition.
These changes make it unnecessary to copy header files around during
the build process, which tends to confuse IDEs and debuggers. The
headers which comprise Cantera's external C++ interface are now in
the 'include' directory.
All of the samples and demos are now in the 'samples' subdirectory.
