API Improved support for versioned DataObject
API GridField extensions for versioned dataobjects
API De-couple File and ErrorPage
API File::handle_shortcode now respects canView()
API AssetControlExtension is now able to delete, publish, or protect files
API Upload now protects new assets by default
API Reduce GeneratedAssetHandler API
API Re-introduce Requirements::delete_all_combined_files();
API Re-introduce Requirements::flush()
API Combined files now uses new filenames distinguished by sha1 of sources