Updated docs/emacs

  * emacs.org: removed indent for one configuration, with Org document
    it is useless (one should read the document not the source :) and it
    causes some minor trouble with LaTeX export;
  * (TOP)/emacs.d/org-us.el: regenerated, tangled from Org document.

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