Add keybindings for del-word-left and del-word-right.

M EditorWindow.py
M NEWS.txt
M config-keys.def
M configHandler.py
diff --git a/Lib/idlelib/configHandler.py b/Lib/idlelib/configHandler.py
index ea913c7..191a87c 100644
--- a/Lib/idlelib/configHandler.py
+++ b/Lib/idlelib/configHandler.py
@@ -579,7 +579,9 @@
             '<<tabify-region>>': ['<Alt-Key-5>'],
             '<<untabify-region>>': ['<Alt-Key-6>'],
             '<<toggle-tabs>>': ['<Alt-Key-t>'],
-            '<<change-indentwidth>>': ['<Alt-Key-u>']
+            '<<change-indentwidth>>': ['<Alt-Key-u>'],
+            '<<del-word-left>>': ['<Control-Key-BackSpace>'],
+            '<<del-word-right>>': ['<Control-Key-Delete>']
             }
         if keySetName:
             for event in keyBindings.keys():