This updates the evolve, list-evolutions, and wipe-evolution

commands to properly take positional arguments on modern versions of

Django. Previously, these were limited to keyword arguments, due to a

change in how argument parsing works now in Django. Positional arguments

have to be explicitly added to the arg parser, with a name of args.
The base compatibility class has also been updated to not break when

positional arguments are used on versions of Django using optparse.

Ran these commands on Django 1.6 and 1.11 with positional arguments.