FRIENDLIST UPDATE

Needs summary. FRIENDLIST_UPDATE

Payload
None

Details
Fired when...
 * You log in
 * Open the friends window (twice)
 * Switch from the ignore list to the friend's list
 * Switch from the guild, raid, or who tab back to the friends tab (twice)
 * Add a friend
 * Remove a friend
 * Friend comes online
 * Friend goes offline