[youtube] signatures: Recognize javascript functions that contain “$” (fixes #2304)
[test/youtube_signature] Add a test with the last player

To verify it correctly handles function with “$” in their names.
[vine] Simplify
[statigram] Simplify
[vbox7] simplify
[ina] Simplify

Download the feed with ‘_download_xml’ to make the extraction easier
release 2014.02.04.1
Merge branch 'master' of https://github.com/rg3/youtube-dl