add featured image for category
get child_categories via page_processor
fix child categories css
Merge
Initialize credit card expiry month to the current month.

--HG--
extra : transplant_source : %C1n%9Cw%90%C5%5B%EAt%8B%C0%ED8%BF%9DV%7CQ%C1%CA
Added Stripe Integration
Merge
Rename stripe package and clean up some of the exception handling.
Fix imports
Add a link to the travis site from the status image in README.
Added new sites to the list in README.
README tweak
Order.setup stores discount_code from session
Order.setup stores discount_code from session
Add Mezzanine's new 404 handler to project template's urls.py.
Merge
Added charleskoll.com to sites in README.
Added puraforceremedies.com to sites in README.
Update transifex configuration
Update translations from Transifex