(Killing): Copyedit. Define read-only text.

(Killing): Copyedit.  Define read-only text.
(Deletion): DEL and C-d were already explained in Erasing; xref there.
(Killing by Lines): Copyedit.
(Other Kill Commands): Move M-w description here.
(Yanking): Move M-w to Other Kill Commands.
(Kill Ring): Also mention saving text in registers.  Link to Text
Properties in elisp manual.
(Accumulating Text): Copyedit.
(CUA Bindings): Shift selection is now the default.