Add ability to load user provided API key; eventually should autogenerate this if no key exists.
Add main() and command line usage.
Change unshort.py permissions; add shebang line; add encoding line.
Merge branch 'master' of github.com:StevenMaude/pyunshort_me into api_key
Add .gitignore.
Add virtualenv directories to .gitignore.
Merge pull request #1 from StevenMaude/api_key

Add ability for user to specify API key; at some point in future, will generate a key automatically if one does not exist