Add yummly.recipe and yummly.search functions.
Add test runner and yummly tests.
Add pip requirements.txt.
Update gitignore to ignore virtualenv folder, "/env".
Ignore test config file.
Move main yummly code to yummly.py, import it in __init__.py, and update yummly import in tests.
Add docstring to yummly.py.
Add setup.py and _version.py.