Links for toposort

toposort-1.4: The standard distribution

toposort-1.4+1: A patched version that runs on Python 2.6. also
                See https://bitbucket.org/riccardomurri/toposort/commits/9f4b8d7b854ea0b94466c598ba9801fd8f95ea79

                Downloaded the changed files, adjusted setup.py with the
                new version number and build the wheels.


Built with explicitely given --python-tag=... and the corresponding
Python version