Coverage Improvements

Customers of Prezly Coverage now have more options to organise press and media clippings by language, source (integration vs manually added) and country.

• Added language/culture field to coverage
• Added country field to coverage
• Replaced existing types (file vs online) with 'real' media types: tv, radio, online, social and print
• Allow integrations (Belga, RSS Feed, Knewin, Kantar) to provide the information source
• Link to the right page in the respective integration
• Improved thumbnail detection of coverage
• Coverage icons now display the type (video vs file vs audio)
• Updated coverage SDK
• Added filters (sidebar + filter menu) to coverage grid