Add various anime download sites

Soulanime, Gogoanime, and various sites that host anime (videofun, play44, byzoo, video44, videowing, playpanda, videozoo, playbb, easyvideo)

Let me know if anything needs to be changed if you wish to merge :)
Does not work for me:
```
> python -m youtube_dl -v http://www.gogoanime.com/mahou-shoujo-madoka-magica-movie-1
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', 'http://www.gogoanime.com/mahou-shoujo-madoka-magica-movie-1']
[debug] Encodings: locale cp1251, fs mbcs, out None, pref cp1251
[debug] youtube-dl version 2014.12.17.2
[debug] Python version 2.7.6 - Windows-2003Server-5.2.3790-SP2
[debug] exe versions: ffmpeg N-68694-g7c210c4, ffprobe N-68694-g7c210c4, rtmpdump 2.3
[debug] Proxy map: {}
[gogoanime] mahou-shoujo-madoka-magica-movie-1: Downloading video page
[download] Downloading playlist: mahou-shoujo-madoka-magica-movie-1
[gogoanime] playlist mahou-shoujo-madoka-magica-movie-1: Collected 3 video ids (downloading 3 of them)
[download] Downloading video 1 of 3
[generic] a8d6a39522df066bd734a69f2334497e?w=600&h=438: Requesting header
WARNING: Falling back on generic information extractor.
[generic] a8d6a39522df066bd734a69f2334497e?w=600&h=438: Downloading webpage
[generic] a8d6a39522df066bd734a69f2334497e?w=600&h=438: Extracting information
ERROR: Unsupported URL: http://videowing.me/embed/a8d6a39522df066bd734a69f2334497e?w=600&h=438; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "youtube_dl\extractor\generic.py", line 660, in _real_extract
    doc = parse_xml(webpage)
  File "youtube_dl\utils.py", line 1444, in parse_xml
    tree = xml.etree.ElementTree.XML(s.encode('utf-8'), **kwargs)
  File "C:\Python27\lib\xml\etree\ElementTree.py", line 1300, in XML
    parser.feed(text)
  File "C:\Python27\lib\xml\etree\ElementTree.py", line 1642, in feed
    self._raiseerror(v)
  File "C:\Python27\lib\xml\etree\ElementTree.py", line 1506, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 23, column 1861
Traceback (most recent call last):
  File "youtube_dl\YoutubeDL.py", line 592, in extract_info
    ie_result = ie.extract(url)
  File "youtube_dl\extractor\common.py", line 243, in extract
    return self._real_extract(url)
  File "youtube_dl\extractor\generic.py", line 1060, in _real_extract
    raise ExtractorError('Unsupported URL: %s' % url)
ExtractorError: Unsupported URL: http://videowing.me/embed/a8d6a39522df066bd734a69f2334497e?w=600&h=438; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
```