Rename module to prevent collision with Padrino.
Fix hanging test when all banners are same.
Some refactors.
Make private methods private.
Add Frontend class.
Make collection an instance variable of Frontend.
Subclass Redis, save and load objects.
A lot of refactors.
Define equality for banners, refactor settings.
Switch to ERB, fix layout, add README.
Add Campaigns and Selections.
Add admin views, remove weights from banners.