Philipp Hagemeister b7ab059084 Add infrastructure for paged lists
This commit allows to download pages in playlists as needed instead of all at once.
Before this commit,
    youtube-dl http://www.youtube.com/user/ANNnewsCH/videos --playlist-end 2 --skip-download
took quite some time - now it's almost instantaneous.
As an example, the youtube:user extractor has been converted.
Fixes #2175
2014-01-20 11:36:47 +01:00
..
2013-11-25 03:47:32 +01:00
2012-12-01 15:52:34 +01:00
2014-01-17 03:54:54 +01:00