Nupass

* ADD: Include README as long description on PyPI.
* CHANGE: Use native setuptools method for script installation.

Enhancements
9 - Word length now set by function parameters instead of constants.

Bug Fixes
7 - Fixed an issue where the wordlist wasn't being closed properly.
2 - Properly handle invalid command line arguments.

Enhancements

1 - NuPass rewritten as a package and made available via [PyPI](https://pypi.python.org/pypi/nupass).

NuPass works as a CLI program!