Includes PHPDoc license tag in the file-level block with accompanying copyright notice.
Also added an AUTHORS file on the off chance of outside contributions
- Database functions now accept any input, but throw typeViolation exceptions where appropriate instead of idMissing or subjectMissing
- Added unit tests for the new Misc\ValueInfo static class
- Added ValueInfo::id() method to centrally validate database IDs, and made use of it consistently
- Made use of PHP's filter_var() function where appropriate when validating or sanitizing input
- Made the NCN protocol handler reject most invalid IDs before handing off to method handlers
- Made NCN's feedUpdate and subscriptionMove methods return 422 on invalid input
- Adjusted several tests to handler type violations
- Changed Data::$l to Data::$lang; it's not used enough to justify the possibly confusing shortening
- Made database auto-update a general rather than per-driver setting
- Added settings for forthcoming feed fetching service
