Renamed stylecheck.py to sc.py to resolve issues with importing since the package and module were the same name.
The -v option now uses the __version__ from stylecheck/__init__.py.
Made file arguments optional.
Implemented --list option to list all rules for specified languages.

Conflicts:
	stylecheck/sc.py
Fixed import error in test_c.py due to move.
Added a . separator between package and rule when listing.
Added a Usage section to README.