Fix a bug for the img of the items
Fix bug in the popover and improve it

-No more bug
-It will load only once the info
delete the @ for mentionned tag
correct a bug in the twitter tag
Favorite icon is now a star
Add a button to add a tag to the item
Added the diigo to the share bar
Correct a bug for the long tag
Fix a second bug with the long tag
Added i18n to placeholder for new tag
Fix a bug in the title of the popover
Merge pull request #38 from tcomte/items

Improved the items layout
Merge pull request #65 from tcomte/master

Fix bug in the items/tag layout + add diigo in the share bar