[yesjapan] Add new extractor (Closes #4466)
[yesjapan] Look for datetime inside `submit_info`

Oops..
Add offlinetest make target
Remove test/write_info_json

This is now covered by every single test_download testcase anyways :)
Improve and test ffmpeg version detection
[Makefile] Ensure that offline test really is offline
[YoutubeDL] Make postprocessors declarative

Instead of having to configure PPs in code, this allows us and embedding programs not to worry about imports or finer details, similarly to how we handle IEs.
[YoutubeDL] Add declarative version of progress hooks
[README] Make example audio sound not that horrible ;)
release 2014.12.15
[mooshare] Modernize
[streamcloud] Modernize
Remove unused imports
[README] Highlight code examples
[README] Fix code rendering
[youtube:playlist] Work around buggy playlists (fixes #4449)

They show a "Load more" button, but they don't have more videos.
The continuation url in the json file was a link to itself, so we ended up in an infinite loop.
[YoutubeDL] Document where details for format can be found
[devscripts/make_contributing] Switch to optparse (Fixes #4483)
release 2014.12.16
Drop hash character in downloader output (#4484)