Add support for cartoonnetwork.com show pages

[keybounce]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like that [x])
• Use Preview tab to see how your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.07.17. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• [ x] I've verified and I assure that I'm running youtube-dl 2016.07.17

Before submitting an issue make sure you have:

• [x ] At least skimmed through README and most notably FAQ and BUGS sections
• [x ] Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• [ x] Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

keybounceMBP:Ninjago michael$ youtube-dl -U
Updating to version 2016.07.17 ...
Updated youtube-dl. Restart youtube-dl to use the new version.
keybounceMBP:Ninjago michael$ youtube-dl -v -F http://www.cartoonnetwork.com/video/ninjago/episodes/index.html
[debug] System config: []
[debug] User config: [u'-o', u'%(title)s.%(ext)s', u'-f', u'\nbest[ext=mp4][height>431][height<=576]/\nbestvideo[ext=mp4][height=480]+bestaudio[ext=m4a]/\nbest[ext=mp4][height>340][height<=431]/\nbestvideo[ext=mp4][height>360][height<=576]+bestaudio/\nbest[height>340][height<=576]/\nbestvideo[height>360][height<=576]+bestaudio/\nbestvideo[height=360]+bestaudio/\nbest[ext=mp4][height>=280][height<=360]/\nbest[height<=576]/\nworst', u'--write-sub', u'--embed-subs', u'--recode-video', u'mp4', u'--mark-watched']
[debug] Command-line args: [u'-v', u'-F', u'http://www.cartoonnetwork.com/video/ninjago/episodes/index.html']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.07.17
[debug] Python version 2.7.5 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.1.1, ffprobe 3.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[generic] index: Requesting header
WARNING: Falling back on generic information extractor.
[generic] index: Downloading webpage
[generic] index: Extracting information
ERROR: Unsupported URL: http://www.cartoonnetwork.com/video/ninjago/episodes/index.html
Traceback (most recent call last):
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1579, in _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/Users/michael/bin/youtube-dl/youtube_dl/compat.py", line 2525, in compat_etree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=_TreeBuilder(element_factory=_element_factory)))
  File "/Users/michael/bin/youtube-dl/youtube_dl/compat.py", line 2514, in _XML
    parser.feed(text)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1642, in feed
    self._raiseerror(v)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 19, column 50
Traceback (most recent call last):
  File "/Users/michael/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 682, in extract_info
    ie_result = ie.extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 347, in extract
    return self._real_extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2303, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: http://www.cartoonnetwork.com/video/ninjago/episodes/index.html

I cannot believe that cartoonnetwork is not supported. This isn't even a locked show.

I also cannot believe that a search for cartoonnetwork.com returned no hits. Zero open, zero closed. But it did.

I cannot help but feel I'm doing something wrong ...

[keybounce]

How can I provide you with an account and password?

[pikhq]

This site might be geo-restricted, but I don't believe a TV provider account is necessary for all the videos. http://www.cartoonnetwork.com/video/steven-universe/lion-loves-to-fit-in-a-box-episode.html is a video which should be viewable without being logged in.