Now has a simple no arguments main method.

This change seemed to be necessary in order to make setup.py behave correctly. Previously running ssstatic after installing from setup.py (e.g. after doing a pip install) would fail because setuptools seemed to be invoking main with no arguments.

```
$ ssstatic static/ imdbflix/static/
Traceback (most recent call last):
  File "/Users/johannth/Development/WilsonMuuga/watchlist/venv/bin/ssstatic", line 9, in <module>
    load_entry_point('ssstatic==0.6', 'console_scripts', 'ssstatic')()
TypeError: main() takes at least 2 arguments (0 given)
```

A simple fix was to create a new main function with no arguments that invokes the old (and renamed) main function