Commented Feature: Add Video to Extended Entities [2515]

https://tweetinvi.codeplex.com/discussions/581593#editor
https://twittercommunity.com/t/twitter-video-support-in-rest-and-streaming-api/31258/10
Comments: Associated with changeset 42200: Version 0.9.6.0
- Added Video to the Entities
- Tweet.Entities will now return the ExtendedEntities if they exist, otherwise it will return the legacy Entities.
- Tweet.ExtendedEntities has been removed for clarity
- To access LegacyEntities, use the TweetDTO.LegacyEntities