remove pointerbox arrow w/ css for older GNOMEs
support 3.11 thru 3.14
Merge pull request #2 from viralex/master

update to 3.14 and Italian translation

Conflicts:
	metadata.json

Restored previous translator metadata in German translation,
but took line-number "# extension.js:56" comment update.
preferences pane experiment from Oct 24 2013