Add Support For CBC Please & Thank You

[CBC-Please]

youtube-dl --verbose "http://www.cbc.ca/natureofthings/episodes/nuts-about-squirrels"

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'http://www.cbc.ca/natureofthings/episodes/nuts-about-squirrels']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.09.19
[debug] Python version 2.7.6 - Linux-3.13.0-35-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] Proxy map: {}
[generic] nuts-about-squirrels: Requesting header
WARNING: Falling back on generic information extractor.
[generic] nuts-about-squirrels: Downloading webpage
[generic] nuts-about-squirrels: Extracting information
ERROR: Unsupported URL: http://www.cbc.ca/natureofthings/episodes/nuts-about-squirrels; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
Traceback (most recent call last):
File "/bin/youtube-dl/youtube_dl/extractor/generic.py", line 545, in _real_extract
doc = parse_xml(webpage)
File "/bin/youtube-dl/youtube_dl/utils.py", line 1509, in parse_xml
tree = xml.etree.ElementTree.XML(s.encode('utf-8'), **kwargs)
File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1300, in XML
parser.feed(text)
File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1642, in feed
self._raiseerror(v)
File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
raise err
ParseError: not well-formed (invalid token): line 48, column 124
Traceback (most recent call last):
File "/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 524, in extract_info
ie_result = ie.extract(url)
File "/bin/youtube-dl/youtube_dl/extractor/common.py", line 180, in extract
return self._real_extract(url)
File "/bin/youtube-dl/youtube_dl/extractor/generic.py", line 890, in _real_extract
raise ExtractorError('Unsupported URL: %s' % url)
ExtractorError: Unsupported URL: http://www.cbc.ca/natureofthings/episodes/nuts-about-squirrels; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.

[naglis]

Possible duplicate of #2579.