Add support for http://www.extremetube.com
Add support for http://www.mofosex.com
Add support for http://www.xtube.com
[teamcoco] Fix video url extraction for some videos

Video url extraction failed for some videos,
e.g. http://teamcoco.com/video/old-time-baseball

The url extracted was also occasionally suboptimal quality,
e.g. http://teamcoco.com/video/louis-ck-interview-george-w-bush
[CinemassacreIE] Support more embed urls
Add support for live parameter to rtmpdump
[CinemassacreIE] Add live paramter to extracted info as a workaround
[subtitles] refactor to support websites with subtitle information the
webpage.

I added the parameter webpage, so now it's similar to the way automatic
captions are handled. This is an improvement needed for websites like
TED.
[ted] Added support for subtitle download
Merge branch 'ted_subtitles'
Merge remote-tracking branch 'iemejia/master'
[ExtremeTubeIE] Set age_limit to 18 and fix uploader extraction
[XTubeIE] Add description to TEST
Add YoutubeSearchDateIE extractor to youtube.py & __init__.py, which searches by publication date.
Set the extra_info inside YoutubeDL.process_ie_result and set only if the keys are missing
Add the 'webpage_url' field to info_dict

The url for the video page, it must allow to reproduce the result.
It's automatically set by YoutubeDL if it's missing.
Set the 'extractor_key' field in the info_dict

It's the string returned by the class method 'ie_key', which allows to retrieve the extractor with 'get_info_extractor'
Merge pull request #1676 from rzhxeo/extremetube

Add support for http://www.extremetube.com
Merge pull request #1677 from rzhxeo/xtube

Add support for http://www.xtube.com
Merge pull request #1679 from rzhxeo/mofosex

Add support for http://www.mofosex.com