Relax argparse version requirement to workaround a pip 1.5.2 bug (it looks like argparse 1.2.1 cannot be installed when running a Python 2.6 environment).
Relax argparse version requirement to workaround a pip 1.5.2 bug (it looks like argparse 1.2.1 cannot be installed when running a Python 2.6 environment).

andreagrandi/workshopvenues