Ignore js vendor assets
Refactor parser/scrubber

Separate classes into different concerns. Scrubber will handle both
articles and feeds, need to deal with them differently. Add sanitize
transformer to handle removal of RSS advertisements. It’s currently not
operating but will remove nodes of articles that include advertisements
as soon as we come across more to determine a pattern.
Add auth headers if user logged in
Strip leading/trailing whitespace
Create OPML controller
Build Sidekiq job
Add OPML route
OPML parser utility

Read through the OPML file and hand off feed urls to FeedParser
Split out some RSS Validation into its own class
Fix up content scrubber
Move logic from feed controller to model
Refactor FeedParser
Don't parse entries if none exist

Sometimes http errors are passed to feedjira object and this logic
mitigates failure.
Consolidate content on object initialization
Add seed data
Fix seed data
Update front-end
Return on invalid feed
Add valid flag to valid feeds"
Change update scope

Only pull in feeds that are currently valid. Need to create
worker to check validity of feeds after a period of time in
case feed has been reactivated.