Update features-json/multicolumn.json

Just tested in Firefox 17 beta 3, it still doesn't work.
chrome 24 support unprefix requestAnimationFrame
chrome 25 support Content-Security-Policy header
chrome 20+ support current Fullscreen API
Update features-json/css-boxshadow.json

Added IE9 box-shadow quirk to bugs.
data update
Merge pull request #47 from julienwOL/master

Tested column-span in latest Firefox Beta
Merge pull request #48 from syoichi/topic

Update chrome status
Merge pull request #49 from Francisc/patch-1

Update features-json/css-boxshadow.json
data update
data update
Changing css-grid support in Chrome 24 to "n"o
Add Chrome 23 support for input type=time
Merge pull request #54 from kapitancho/patch-1

Add Chrome 23 support for input type=time
Merge pull request #52 from brcooley/patch-1

Changing css-grid support in Chrome 24 to "n"o
data update
Update features-json/input-datetime.json

Additional Chrome updates from http://www.chromium.org/developers/web-platform-status/forms
Merge pull request #57 from phistuck/patch-2

Update features-json/input-datetime.json
data update
data update