Update db strings
Update django debug toolbar to 0.9.4.
Move all decisions about question and permissions to the models.
[bug 602990] Allow moderators to reply and edit locked questions.

Based on add_answer and change_answer permissions.
[bug 931274] Add Windows 8.1 to aaq & better fallback for WinNT
Update to detect windows 8.1
Update Gravatar tooltip text