[README] Replace links to kernel.org with links to git-scm.com

Unlike kernel.org, the documentation at git-scm.com is up to date and
the rest of the git documentation is easily accessible to any git
newby.
[utils] Remove unused import
Add support for goldenmoustache.com
[wrzuta] Add mp3 as a possible format (Closes #4126)
[FreeVideo] Add new extractor
[niconico:playlist] Use the same video url the webpage uses (closes #4133)
[options] Document the syntax for merging formats (closes #3940, closes #4132)
fix swrmediathek for new formats.
Merge remote-tracking branch 'origin/master'
[YoutubeDL] Don't dowload formats for merging if the first doesn't contain the video (#4132)
[ndr] Improve video url regex (fixes #4140)
Merge pull request #4136 from andikmu/master

fix swrmediathek for new formats.
[tapely] Add Referer header (Closes #4138)
[streamcloud] Match URLs without fname (Closes #4144)

Also, modernize a bit.
[YoutubeDL] Add playlist_id and playlist_title fields (Fixes #4139)
release 2014.11.09
[wrzuta] Fix audio extension lookup (Closes #4156)

Also, replace deleted test case
[wrzuta] Fallback to mp3 on unknown media type (#4156)
Fix MTV/GameTrailers "Bad Request" error

Bugfix for bug #4123 & #4153
release 2014.11.12