Merge Py Idle changes:

Rev 1.39 GvR
Properly fix SF bug #507298 (Gregor Lingl): shellpython2.2 -Qnew smart
indent error

Use // where int division is intended.  (This breaks IDLE for use with
previous Python versions -- I don't care.)

Rev 1.40 tim_one
Convert a pile of obvious "yes/no" functions to return bool.

Rev 1.41 foffani/loewis
(already merged)  - MS html help

Rev 1.42
(skip, done differently in Idlefork)

Rev 1.43 tzot/rhettinger
Extended IDLE's open module menu item to handle hierarchical module names.
Will look at doing something similar in import.c so that the effort won't
have to be repeated elsewhere.
Closes SF patch 600152.

Rev 1.44 doerwalter
(string methods)