Add Adventure Overview and Character Control overlay

Author: DaisukeDaisuke

README.md

@@ -46,6 +46,7 @@ overlay 0: Player Controls  in field, battle code? etc?
 overlay 1: Event Movie Progression
 overlay 2: maybe Standard menu????
 overlay 3: Player Control in Villages?
+overlay 4: Adventure Overview + Character Control in grotto?
 overlay 8: Stella(sandy) Interrupt Window
 overlay 9: maybe ending
 overlay 14: Monster encyclopedia