work-a-round for Py2: className can't be unicode

Author: jedie

dragonpy/core/gui.py

@@ -136,7 +136,7 @@ def __init__(self, cfg, display_queue, user_input_queue):
         self.cpu_cycles_update_interval = 1
         self.next_cpu_cycle_update = time.time() + self.cpu_cycles_update_interval
 
-        self.root = tkinter.Tk(className="DragonPy")
+        self.root = tkinter.Tk()
 
         self.root.bind("<Key>", self.event_key_pressed)
         self.root.bind("<<Paste>>", self.paste_clipboard)