Updated docs/emacs

  * emacs.org: finally found the source of my trouble with SRC blocks
    within lists, problem was in activating
    'org-src-preserve-indentation', without it with appropriate
    adoptation of the document I managed to export Org document to HTML
    and correctly tangle from it all .el files;
  * minimal.org: updated syntax;
  * (TOP)/emacs.d/*.el: updated.

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