Refactored previews.
Fixed merge conflict from .jpg
deleted old code
Added s3 gem for storing generated images
Untracked s3 login credentials
Created constant for s3 login credentials
Switched from aws-s3 to aws-sdk gem. aws-s3 was conflicting with Ruby 2.1.0
wallpapers are no longer written to file. Instead they are uploaded straight to s3
Currently user is redirected to image created in s3 bucket. This is temporary!
Removed binding.