docu added to messagedialogs

xsagtk/message_dialogs.py

 import gtk
 
 def create_error_message(message):
+    """Creates a message-dialog for errors, which contains a warning-sign and a ok-button
+
+    **Parameters**
+        :message: str: message, that will be displayed
+    """
     md = gtk.MessageDialog( type=gtk.MESSAGE_WARNING,
                             buttons=gtk.BUTTONS_OK,
                             message_format=str(message)
@@ -9,6 +14,11 @@ def create_error_message(message):
     md.destroy()
 
 def create_confirmation_message(message):
+    """Creates a message-dialog with confirmation buttons (yes/no), that contains a warning-sign
+
+    **Parameters**
+        :message: str: message, that will be displayed
+    """
     md = gtk.MessageDialog(type=gtk.MESSAGE_WARNING,
                            buttons=gtk.BUTTONS_YES_NO,
                            message_format=message