Reflect suport for full vs partial syntax
add link, update Firefox 32+ and Opera 24+

Opera data from http://www.chromestatus.com/feature/5030265697075200
Firefox data from https://bugzilla.mozilla.org/show_bug.cgi?id=865789 and https://docs.google.com/spreadsheet/ccc?key=0AiAcidBZRLxndE9LWEs2R1oxZ0xidUVoU3FQbFFobkE&usp=sharing#gid=1
changed "d" to "n d #2" under firefox
Add picture flag to Firefox 33
data update
Added HTML5 Rocks tutorial for the picture tag
Typo: missing comma
Add empty notes field
Update picture.json
Merge pull request #722 from nwtn/master

Update responsive image data
Merge pull request #723 from mkurz/pic_html5rocks

Added HTML5 Rocks tutorial for the picture tag
Merge pull request #721 from hakanson/patch-1

add link, update Firefox 32+ and Opera 24+
data update