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)
Now a new FileDownloader is created when downloading a video

The progress hooks can be added using the method "add_downloader_progress_hook"
Move FileDownloader to its own module and create a new class for each download process

A suitable downloader can be found using the 'get_suitable_downloader' function.

Each subclass implements 'real_download', for downloading an info dict you call the 'download' method, which first checks if the video has already been downloaded