Refactor model / controller code, and bug fixes

Condense feed update code and move most to feed, add delayed job for processing entry images. Fix issue with entry id being nil. Sanitize raw feed html. Refactor libs.
Fix double console log issue
Fix javascript polling, some view updates
Add image_url to entries table
Change header styling
More header tweaks
Add max feeds validation check, just in case
Fix layout and ui, clean entry presentation

Add script to hide external images in entry content that error (ie forbidden). Work on layout, fix sticky on mobile.
Add api routes for ajax bits

Try to prevent json from displaying on back navigation