Api update

merge request so that you can comment the code ;)

km3io/aanet.py

@@ -161,14 +161,14 @@ class AanetReader(AanetKeys):
 
     def __getitem__(self, item):
         return AanetReader(file_path=self._file_path,
-                           data=self._lazy_data[item])
+                           data=self._data[item])
 
     @property
     def events(self):
         if self._events is None:
             self._events = AanetEvents(
                 self.events_keys,
-                [self._lazy_data[key] for key in self.events_keys])
+                [self._data[key] for key in self.events_keys])
         return self._events
 
     @property