Support Xiami MV (Taobao video player)

[leeming87v5]

Hi,
I'm using linux YouTube-dl to download a video from xiami.com;
the command is:

youtube-dl -v 'https://www.xiami.com/mv/K6YmI0'

And I got the following output:

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.xiami.com/mv/K6YmI0']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.12.23
[debug] Python version 2.7.12 - Linux-4.4.0-119-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: avconv 2.8.14-0ubuntu0.16.04.1, avprobe 2.8.14-0ubuntu0.16.04.1, ffmpeg 2.8.14-0ubuntu0.16.04.1, ffprobe 2.8.14-0ubuntu0.16.04.1
[debug] Proxy map: {}
[generic] K6YmI0: Requesting header
WARNING: Falling back on generic information extractor.
[generic] K6YmI0: Downloading webpage
[generic] K6YmI0: Extracting information
ERROR: Unsupported URL: https://www.xiami.com/mv/K6YmI0
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2163, in _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2539, in compat_etree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=_TreeBuilder(element_factory=_element_factory)))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2528, in _XML
    parser.feed(text)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1653, in feed
    self._raiseerror(v)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1517, in _raiseerror
    raise err
ParseError: syntax error: line 4, column 0
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 438, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 3063, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: https://www.xiami.com/mv/K6YmI0

Seems like YouTube-dl don't support it.
FIX IT plz, thx