Both the reactor and the adjacent reservoir need to have the same pressure. This
example relied on the fact that the default pressure of the 'air' phase is 1
atm, which caused it to break if the user changed the pressure of the reactor
gas.
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.