Fix README path in setup.py
Add some ignores
Remove unused import
Whitespace
Trailing whitespace
Fix a bug in the payment view

is_authenticated is a function, not a boolean.
Remove unused imports
Remove unused stub modules
PEP8
Correct variable name

Should be FORM_PREFIX, not FORM_PREIX
Stylistic improvements
Update README.md
Don't store customer information

The implementation of this feature relied on a deprecated Django API.
As far as I see, it also relied on a a model field being present on the user
profile, but this was not documented anywhere.
Maybe we can re-implement this feature at a later point.
Payment view: error handling, coding style

Throw ImproperlyConfigured if a required setting is missing.
Improve code readability a little.
Replace render_to_response with render
Fix bug in payment view (undefined variable)
Remove unused exception
Fix typo
Error handling