added coordinates of camera view in map

dungeonbattle/interfaces.py

@@ -10,6 +10,8 @@ class Map:
     width: int
     height: int
     tiles: list
+    currentx : int #coordinates of the point that should be on the topleft corner of the screen
+    currenty : int 
 
     def __init__(self, width: int, height: int, tiles: list, entities = []):
         self.width = width