(Easy Customization): Use "init file" instead of .emacs.

(Easy Customization): Use "init file" instead of .emacs.
(Customization Groups): Update to new Custom buffer appearance.
(Saving Customizations): Copyedits.  Update example.
(Variables): Give example of variable type-sensitivity.
(Examining): Update example.
(Hooks): Copyedits.
(Specifying File Variables): Use C comments instead of an artificial
Lisp for the example.
(Keymaps): Move internals discussion to Prefix Keymaps.
(Rebinding): Remove redundant paragraph (stated in Key Binding).
(Init Rebinding): Document kbd macro.
(Init File): Link to Find Init.