support for caching

[satishVekariya]

Local disk caching,
user only needs to stream a file once and after that it can be played from a local cache

[satishVekariya]

https://andreygordeev.com/2018/03/31/cache-avplayeritem/
https://github.com/neekeetab/CachingPlayerItem
https://github.com/vitoziv/VIMediaCache
https://github.com/muhku/FreeStreamer