BP_Email_Tokens::__construct()

	public function __construct() {
		// set new email tokens added in BuddyBoss 1.0.0
		add_filter( 'bp_email_set_tokens', array( $this, 'set_tokens' ), 10, 3 );

		//tokens for email after a new message is received, does not contain usable info about sender user
		//we need to acquire this info before we process tokens for that email
		//priority 9 is importent
		add_action( 'messages_message_sent', array( $this, 'messages_message_sent' ), 9 );
	}