Started implementing prototype into Swift

This week I created class to handle freehand paths and I added option to move items up and down. After that I started implementing my prototype into swift. I created classes needed to handle new window and  then I created simple controller class and added simple payload to swiften. I placed my controller in ChatController, but I did that only for testing purposes. I will think about right place for it later. I wanted to "make something working", so I added serialization function to whiteboard window class(It isn't place for it, but it was easiest way to do serialization). After connecting everything in the controller I was able to send lines and handfree paths.