Add Amazon gateway, api, and not-currently-functional controller
Add pluggable_js gem for redirecting from controller
Nevermind with the pluggable js
Payments now work; confirmation WIP
Fixed some whitespace issues and signature verification is up and running
Add cleaner amazon api call api, and refactor sign_params
Add new api system to library
Move api call api into the amazon_fps gateway to make it look less like coupling
Clean up controller code a teeny bit
Make amazon form submission page say Redirecting
Fixed some syntax errors
Changed controller logic to fit with new gateway interface
Payment is good to go.
Beginning to add refund functionality
Basic refund functionality is complete
Purchases now formally complete, and shipping is included in the amazon payment description
Purchases now formally complete, and shipping is included in the amazon payment description
Basic  IPN functionality added; can't test until port can be opened
Made checkout save status on purchase
Stability related changes + removed spree_auth_devise gem