Updated docs and mc

  * mc/mc.keymap: added (almost default) keymap for MC;
  * docs/emacs/emacs.org: checked (again) mail settings, now mail
    sending works reasonably, changed name for Russian input method
    (input in Emacs Russian letters while keyboard layout is dvorak)
    with changing fil name.

Signed-off-by: Vladimir Lomov <lomov.vl@gmail.com>