Because normalizing the species coverages leads to incorrect Jacobian
calculations, it is sometimes necessary to not normalize the coverages.
As for bulk species mass/mole fractions, this option is currently only
available when passing the coverages as a vector (i.e., not available
for string identifiers).
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.
