create models for series, episodes, images
add source column to image model, specify which fields are not nullable
add configuration for aws s3
add join table for user's favorite shows, make join table foreign keys
not nullable
add user favorites
filter out episode images from series image list
add functions to save images to amazon s3 and generate a url
update get_series to create image objects and save them to amazon s3
implement series detail view
add detail template, add db migration for user favorites