Checking in IDLE 0.2.

Much has changed -- too much, in fact, to write down.
The big news is that there's a standard way to write IDLE extensions;
see extend.txt.  Some sample extensions have been provided, and
some existing code has been converted to extensions.  Probably the
biggest new user feature is a new search dialog with more options,
search and replace, and even search in files (grep).

This is exactly as downloaded from my laptop after returning
from the holidays -- it hasn't even been tested on Unix yet.
diff --git a/Tools/idle/idlever.py b/Tools/idle/idlever.py
new file mode 100644
index 0000000..7465590
--- /dev/null
+++ b/Tools/idle/idlever.py
@@ -0,0 +1 @@
+IDLE_VERSION = "0.2"