[bd] API 1.6.3

• Added param reason for post/thread/profile post deletion
• Added latest_posts into thread data
• Added latest_comments into profile post data
• Added timeline_username into profile post data
• Added user_followers_total and user_followings_total into user data
• Added username into associatable user data
• Added user_unread_notification_count for alert ping
• Added support for thread prefixes
• Added support for social accounts association (Facebook, Google)
• Improved support for Google ID token
• Improved attachment data output
• Improved logging
• Fixed bugs