Notification API Cleanup

New: Validate PMS version before performing a library update

New: Support for Plex Media Server 1.3.0's new JSON responses

Added additional gdiplus check.

Fixed: Failing database migration of metadata files without extensions

Fixed: Handling of some really long qBittorrent ETAs

Fixed: Added fallback and log errors when Tls1.2 clashes with https c…

…ertificate with obsolete md5 hash.

Fixed api blacklist, history, wanted/missing and wanted/cutoff requir…

…ing sortKey, now defaulting to an appropriate value (airDateUtc/date desc for most).

fixes Sonarr#1452