avatars: Use more reliable LastWriteTime to determine whether the avatar needs refetching
Added new icon for Mac Yosemite+
Merge pull request #1586 from snwh/master

Added new icon for Mac Yosemite+
mac ui: Integrate new Yosemite folder icon. Closes #1585
Update Authors.txt
mac bubbles: Clean up
Update Authors.txt
Merge pull request #1587 from BarryThePenguin/patch-1

Update Authors.txt