Updated ancillary for SES36 from v4

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
moved flag for critical region splines to Configuration

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Don't use enthalpy/entropy ancillaries if they don't exist

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
CMake does not use EXTERNC by default for static library

* Unless you ask for -DCOOLPROP_EXTERN_STATIC_LIBRARY=ON

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
When using CMake, touch CoolProp.pyx to make sure rebuild actually happens

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
PropsSI and Props function docs

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Removed deriv terms from CoolProp.h header

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fortran needs EXTERNC in the static library

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed typo in FORTRAN docs

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