Updated import statements to use the new `configparser` module name.
Updated the documentation to use the new name.
Revert addition of the stub entry for the old name.

Georg, I am reverting your changes since this commit should propagate
to py3k.
diff --git a/Lib/idlelib/configHandler.py b/Lib/idlelib/configHandler.py
index 3fc2a60..bdce85d 100644
--- a/Lib/idlelib/configHandler.py
+++ b/Lib/idlelib/configHandler.py
@@ -21,7 +21,7 @@
 import sys
 import string
 import macosxSupport
-from ConfigParser import ConfigParser, NoOptionError, NoSectionError
+from configparser import ConfigParser, NoOptionError, NoSectionError
 
 class InvalidConfigType(Exception): pass
 class InvalidConfigSet(Exception): pass