Fix replacement `subprocess.check_output` behaviour on error.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20599 b5f69653-2bf5-0310-8201-b0dafb8e1405
Add a translator class that generates Cython code (#2459).

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20600 b5f69653-2bf5-0310-8201-b0dafb8e1405