[tvp] Telewizja Polska: new extractor for tvp.pl, fixes #1719

Thanks-To: mplonski

https://github.com/mplonski/linux/blob/master/tvp-dl.py
Add extractor for gamekings.tv
[gamekings] Minor fixes (#1759)
Credit @jelly for gamekings extractor (#1759)
Merge remote-tracking branch 'saper/tvp'
[tvp] Minor improvements (#1730)
Credit @saper for tvp IE (#1730)
release 2013.11.13
[gamekings] Fix the test video checksum
Don't assume the 'subtitlesformat' is set in the params dict (fixes #1750)
[livestream] Add an extractor for the original version of livestream (closes #1764)

The two versions use different systems.
[soundlcoud] Set the correct extension for the tracks (fixes #1766)

Some tracks are not in mp3 format, they can be wav files.
[youtube] Fix protocol-independent URLs (Fixes #1768)
Merge branch 'master' of github.com:rg3/youtube-dl
release 2013.11.15
Pass the 'download' argument to 'process_video_result' (fixes #1769)
[youtube:channel] Fix the extraction of autogenerated channels

The ajax pages are empty, now it looks directly in the channel's /videos page
[tvp] Update the title and the description of the test video
Improve the OpenGraph regex

* Do not accept '>' between the property and content attributes.
* Recognize the properties if the content attribute is before the property attribute using two regexes (fixes the extraction of the description for SlideshareIE).
Don't accept '>' inside the content attribute in OpenGraph regexes