These options are rarely necessary. Hide them to make the important options in the general group more obvious.
I still get 403s on YouTube though.
Fixes #3326 Apparently, on some platforms, even outputting this fails already.
Conflicts: youtube_dl/extractor/mlb.py
Also add threatening skip blocks in there - access is only possible from the US. We may want to find a better geolocation restriction method for tests.
Adds support for cbs.com URLs containing "/artist" instead of "/video". E.g.: http://www.cbs.com/shows/liveonletterman/artist/221752/st-vincent/
Conflicts: youtube_dl/extractor/__init__.py
See http://de.wikipedia.org/wiki/Depublizieren for the sad rationale.