[SCons] Fix count of skipped tests

Exclude the partial tests of the Cython module which are included in the full
test.

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2673 02a645c2-efd0-11dd-984d-ab748d24aa7e
[Samples] Explicitly set transport model to 'Mix' for clarity

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2674 02a645c2-efd0-11dd-984d-ab748d24aa7e
[Sphinx/Cython] Add call signatures to constructors

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2675 02a645c2-efd0-11dd-984d-ab748d24aa7e