translate all ESC key sequences.
(viper-goto-mark-subr): restore markers for files for which
they were saved.
* viper-init.el (viper-translate-all-ESC-keysequences): new variable.
* viper-util.el (viper-set-replace-overlay-glyphs,
viper-set-replace-overlay): always check if the replacement
overlay is live.
* viper.el (viper-vi-state-mode-list): added major modes.
* ediff-wind.el: minor comment changes.
* ediff.el: copyright notice date fix.
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