[MixMaster] Fix usage of numpy.zeros and numpy.ones

Cherry pick of trunk r2728.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2730 02a645c2-efd0-11dd-984d-ab748d24aa7e
[MixMaster] Fixes to use Cython function names

DataFrame.importCSV and dataFrame.importData were still using function names
from the old Python module.

Cherry-pick of trunk r2729.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2731 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Fix simultaneous compilation of Python 2 and Python 3 modules

Use separate SCons Environments so the 'py_include_dirs' variable (which
contains the Numpy include directory) can be distinct for each Python module.

Cherry-pick of trunk r2710.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2732 02a645c2-efd0-11dd-984d-ab748d24aa7e