Merge branch 'release/0.3.7' into develop
[domain plugins] add gallery widget to imgur
[domain plugins] improve check of gallery on imgur
[domain plugins] update storify max-width
[domain plugins] issuu.com plugin
[plugin domains] pinterest image plugin
[debug tool] render meta if no links found
temporary move pinterest to .fixme
[domain plugins] cnn video plugin
[domain plugins] check video type on cnn.video
[iframely.js] find better poster image for video tag
[domain plugins] video.nhl.com
[domain plugins] trutv.com
[whatsnew] update
[domain plugins] fix imgur re
[domain plugins] fix video.nhl.com plugin (incorect mixin id used)
[domain plugins] use API for single video in youtube.com
[debug tool] show used plugins as mixins to copy-paste in new developed plugin
[domain plugins] guardian.co.uk video plugin
[domain plugins] fix instagram favicon