Remove youtube_genalgo (#1515)

With the automatic signature extraction, this script has become superfluous now
Merge branch 'master' of github.com:rg3/youtube-dl
Don't fail if the video thumbnail couldn't be downloaded (fixes #1516)

Just report a warning
[youtube] update description of test
[youtube] Set the thumbnail to None if it can't be extracted
[youtube] Add hlsvp to the error message if it can't be found and remove the live stream test

It's no longer available, other olympics streams have the same problem.
[zdf] Add support for hash URLs and simplify (#1518)
Merge branch 'master' of github.com:rg3/youtube-dl
[yahoo] Fix video extraction (fixes #1521)

There's no need to use two different methods.
Now we can also download videos over http if possible.
Also run the test for rtmp videos, but skip the download.
[dailymotion] Disable the family filter in the playlists (fixes #1524)
[update] Look for .exe extension on Windows (Fixes #745)
[update] Prevent cmd window popup on Windows (Fixes #1478)
release 2013.09.29
[appletrailers] Rework extraction (fixes #1387)

The exraction was broken:
* The includes page contains img elements that need to be fixed.
* Use the 'itunes.inc' page, it contains a json dictionary for each trailer with information.
* Get the formats from 'includes/settings{trailer_name}.json'
* Use urljoin to allow urls with a fragment identifier to work

Removed the thumbnail urls from the tests, they are different now.
[appletrailers] The request for the settings must have the trailer name in lower case (fixes #1329)
[rtlnow] Replace one of the tests

The video is no longer available.
implement --no-playlist to only download current video - closes #755
add test for --no-playlist
Support XDG base directory specification
Handle videos without url_encoded_fmt_stream_map (Fixes #1535)