- Simplified folder removal; now properly relies on foreign keys for dependency resolution
- simplified *propertiesSet() methods by offloading input validation and query building to a generic function
- Implemented function to get the properties of a single folder (useful for internal use)
- Implemented a function to set the properties of a folder
• Added category updating in Database->updateFeeds()
• Made Database->updateFeeds() fail quietly when exceptions are
occurred, logging them in the database instead of failing.
• Changed the categories table name from arsse_tags to arsse_categories.
• Started implementing feed updating (Database->updateFeeds())
• Moved hashing to the Feed object, now done when parsing
• Moved adding of articles to the database to its own method
(Database->articleAdd())
• Implemented a simple wrapper for picoFeed which fixes the id problems
and keeps error handling within its own class
• Updated Database.php to use the new class
• Replaced mentions of ownCloud with NextCloud in the schema
• Added hashes to schema for identification and change detection;
removed NextCloud hash and fingerprint; removed enclosure and category
hashes
