added __getitem__ to SettingsList; added set_value to Setting

settings.py

@@ -43,6 +43,9 @@ class SettingsList(wx.GridSizer):
     def set(self, name, value):
         self.children[name].text.SetValue(value)
 
+    def __getitem__(self, key):
+        return self.children[key]
+
 
 
 class Setting:
@@ -72,6 +75,9 @@ class Setting:
     def get_value(self):
         return self.text.GetValue()
 
+    def set_value(self, val):
+        self.text.SetValue(val)
+
 
     def on_state_change(self, event):
         if self.get_state():