[Feature] appendText(text) for FlxTypeText

[AG-w]

It will be more convenient if you can just add more text behind existing text string and it will keep typing
Kinda like how message display in RPG game during a battle, extra message just added behind existing text and keep playing

Maybe something like this will work?

public function appendText(Text:String):Void
	{
		_finalText += Text;
	}