its not all that useful. Fix a few bugs with python/C++ integration. --HG-- extra : convert_revision : a706512f7dc8b0c88f1ff96fe35ab8fbf9548b78
--HG-- extra : convert_revision : b6a975d1c4195a764ba875bc3aaaa064be4955b7
access to enabling/disabling tracing. Command line is unchanged except for the removal of --trace-cycle since it's not so clear what that means. --HG-- extra : convert_revision : c0164d92d3615d76d0c6acaabaafd92a9278212a