Undeprecate script
Install dependencies
RubyTapasDownloader::Login requests login page
Install webmock and VCR
Fill in login form
Login
Episode
Episode download
File
Avoid repeated downloads
DescriptionParser
Move DescriptionParser to Extractors::Episode
Add contract for extractors

All Extractors should inherit RubyTapasDownloader::Extractor.
Extractors::Episode
Tag module Downloadable
Catalog
Create namespace Downloadables
Extractors::Catalog
Rename feed_description to item_description
FeedFetcher