VID-536 Ingest all IVA content

Also:
* cleaned up the ingestion script a bit
* Fixed/added documentation
VID-536 Add back video sets, make second call for TV
Merge branch 'VideoSprint28' into VideoSprint28-VID-536-All-IVA

Conflicts:
	extensions/wikia/VideoHandlers/feedingesters/VideoFeedIngester.class.php
Merge pull request #1088 from Wikia/VideoSprint28-VID-536-All-IVA

VID-536 Ingest all IVA content