Update test_problems for rankine and pureFluid to avoid using the
deprecated PureFluid.h convenience wrapper classes. Update the
rankine.cpp test problem to match the rankine.cpp sample. Switch
both test_problems updated here to use writelog instead of
printf/cout.
CanteraError inerits from std:exception, so now it has a what() method
that is used to print a message describing the exception. Adding an
exception to the Cantera error stack now requires explicitly calling
the .save() method.
Visual Studio defaults to 3-digit exponents when printing in scientific
notation. The tests now use a MSVC-specific function to change this
behavior when necessary.
