When IDLE fail to start because the socket connection fails, direct people to a new subsection of the IDLE doc listing various causes and remedies.

Patch by Roger Serwy, updated by Bayard Randel.

Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.

The reload(sys) effect was the crux of a Stackoverflow question.

Doc/build/html/library/idle.html, which is built from Doc/library/idle.rst.
Help.html is an rstrip()ed copy of idle.html that can be pushed.

The displayed content is unchanged because a) the version number is not
displayed, being inherent in the version displaying the file and b) the tt
tag was ignored by the custom parser in idlelib/help.py.  The wrapped
<span class="pre"> tags remain as they were.

This will be merged in 3.6 (without conflict) because the 3.6 help.html is
a copy of the 3.5 file (which was a copy of the 3.4 file).  The two files will
remain the same until either a) there is a content change that only applies
to one of them or b) 3.5 maintenance ends and the 3.6 file is itself rebased.

tab in the IDLE Preferences dialog.  Code patch by Mark Roseman.

curious users.  The previous user content is now in the IDLE doc and is
redundant.  IDLE now means 'Integrated Development and Learning Environment'.

to finish making current README.txt obsolete.

Some were missing and notes were not correct.

Change destination to help.html.  Adjust NEWS entries.

The new idlelib/idle.html is copied from Doc/build/html/idle.html.
It looks better than help.txt and will better document Idle as released.
The tkinter html viewer that works for this file was written by Rose Roseman.
The new code is in idlelib/help.py, a new file for help menu classes.
The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.