Add next_scrape_at to articles.
Set default next_scrape_at.
Add scrape_with_no_changes_count to articles.
Add paper_trail.
Add paper_trail to article.
Add value object to determine next scrape time.
Add before_save to mark_content_changes.
Add scope for needs_rescraping.
Track number of content changes.
Add object_changes to versions.
Ignore article_scraped_at.
Merge branch 'feature/scrape_for_changes' into develop
Add back buttons.
Apply design for mobile.
Add viewport meta for mobile.
Merge branch 'feature/mobile_optimization' into develop