[downloader/(common/http)] Changes calculation of the rate-limit. (Fix #2297, fix #2140, fix #595, fix #2370)
 [downloader/common] Fix possible negative sleep time in slow_down()
[tagesschau] Modernize
[common] Split _download_json
Add ability for extractor to use _parse_json
[howstuffworks] Rewrite extractor
[azubu] Add extractor (Closes #4379)
[howstuffworks] Update extractor
[tagesschau] Add suppot for sendung (Fixes #4378)
release 2014.12.06
[youporn] Fix JSON parameter regexp (Fixes #4384)
release 2014.12.06.1
[adultswim] Updated to work with new site format (fixes #4317)
[nba] Improve _VALID_URL regex (fixes #4387)

Allows for optional trailing / or /index.html
[nba] Modernize
[nba] Add test for #4387
Merge remote-tracking branch 'cryptonaut/adultswim'
[ffmpeg] Improve version check and call it from hls (Fixes #4377)
[youtube] Modernize
Credit @cryptonaut for adultswim (#4388)
[test_utils] Make test more realistically (#4377)