Removed Unnecessary Imports.
Removed Willie code (will be added to its own module).
Added a placeholder sanitize function.
Fixed ElementTree Syntax for string (rather than file).
Added an optional URL parameter to allow better testing.
Added an Exception for when a card is not found.
PEP8 Formatting.
Added some test cases for the price module.
Added an init.py so that this code can be used as a module.