Describe recent frame and window changes in manuals

Describe recent frame and window changes in manuals

* doc/emacs/emacs.texi (Top):
* doc/emacs/cmdargs.texi (Borders X): Clearly separate the terms
"outer border" (for the X border which can be set from within
Emacs) and "external border" (for the border which is added by
the window manager).
* doc/lispref/display.texi (Tooltips): Clarify slightly.
* doc/lispref/elisp.texi (Top): Update node and section names.
* doc/lispref/frames.texi (Frames): Describe difference between
top-level and child frames.
(Frame Layout): Describe outer border.  Add more details about
how Emacs obtains the outer size and position of a frame and
about menu bar/tool bar wrapping.  Add references to new frame
parameters.
(Size and Position): Remove subsection.
(Frame Position): New subsection excerpted from the earlier Size
and Position subsection.  Clarify positioning concepts and
some of their shortcomings.  Describe `move-frame-functions'.
(Frame Size): New subsection excerpted from the earlier Size
and Position subsection.  Describe how to track frame size
changes and the new function `frame-size-changed-p'.
(Position Parameters): Describe child frame positioning.  Warn
about negative offsets.  Describe 'z-group' parameter.
(Size Parameters): Describe 'text-pixels' specification
facility and new 'min-width' and 'min-height' parameters.
(Layout Parameters): Clarify description of 'tool-bar-lines' and
'menu-bar-lines' parameters.
(Frame Interaction Parameters): New subsubsection describing
'parent-frame', 'delete-before', 'mouse-wheel-frame' and
'no-other-frame' parameters.
(Management Parameters): Describe 'skip-taskbar',
'no-focus-on-map', 'no-accept-focus', 'undecorated' and
'override-redirect' parameters.
(Deleting Frames): Describe handling of 'delete-before'
parameter and child frames for `delete-frame' and
`delete-other-frames'.
(Finding All Frames): Describe `frame-list-z-order' and handling
of 'no-other-frame' parameter by `next-frame'.
(Minibuffers and Frames): Minor clarifications.
(Input Focus): Document `x-focus-frame'.  Clarify descriptions
of `focus-in-hook', `focus-out-hook' and `focus-follows-mouse'.
(Visibility of Frames): Describe mapping and how the visibility
of a parent frame affects that of its child frames.
(Raising and Lowering): Describe restacking of frames and
z-groups.
(Child Frames): New section.
* doc/lispref/windows.texi (Selecting Windows): Describe
additional semantics of NORECORD argument of `select-window' and
how `buffer-list-update-hook' can emulate a "select window
hook".
(Mouse Window Auto-selection): New section.