Clean up imports
Fix reporting when file size is unkown (Fixes #1731)
release 2013.11.06
tests: don't run the test if any of the extractors listed in the 'add_ie' field is marked as not working
[brightcove] Add the extraction of the url from generic
[brightcove] Change the 'videoId' or 'videoID' field to '@videoPlayer' (fixes #1697)

It seems to be needed when using the htmlFederated page
Add an extractor for space.com (fixes #1718)

It uses Brightcove, but requires some special process for getting a url with the playerKey field in some videos
[brightcove] Extract all the available formats
Add an extractor for eitb.tv (fixes #1608)

The BrighcoveExperience object doesn't contain the video id, the extractor adds it and passes the url to BrightcoveIE.
[youtube:channel] Fix the extraction

The page don't include the 'load more' button anymore, now we directly get the 'c4_browse_ajax' pages.
[brightcove] Support redirected urls from bcove.me (fixes #1732)

'bctid' needs to be changed to '@videoPlayer', and 'bckey' to 'playerKey'.
release 2013.11.06.1
[xnxx] Accept urls that start with 'www' (fixes #1734)
Fix the report progress when file_size is unknown (#1731)

The report_progress function will accept eta and percent with None value and will set the message to 'Unknow ETA' or 'Unknown %'.
Otherwise the values must be numbers.
release 2013.11.07
[brightcove] Set the 'Referer' header if the url has the 'linkBaseUrl' parameter (fixes #1553)