- Improved parsing of production year (cases like '2001-2003')
- Parse writer field as person
- Parse director field as person
- Parse actors fields as persons
The lack of caching in the OmdbProvider could result in long library
scan time.
This commit adds caching for the OmdbProvider similar to the
MovieDbProvider.
Downloaded metadata is saved locally and only updated if the last
refresh occured 3 or more days before
