GridScope

• Adeed Grid Layout option.
• Cleaned up vote click handling functions and added tests (thanks @anthonymayer!).
• Added threadModules zone.
• Added upvoteCallbacks and downvoteCallbacks callback arrays.
• Fix “post awaiting moderation” message bug.
• You can now subscribe to comment threads (thanks @delgermurun!).
• Added postApproveCallbacks callback array.
• Added notifications for pending and approved posts, for admins and end users.
• Renaming "digest" view to "singleday".
• Make sure only valid properties can be added to posts and comments.
• Added newsletter time setting (thanks @anthonymayer!).
• Change "sign up" to "register" (thanks @Kikobeats!).