Hi all,

would someone with write access please install this patch for me?  It
includes the following improvements:

1. When doing `M-x doc-view' the filename completion doesn't hide pdf,
   ps, and dvi files anymore.

2. I added a simple around advice to `view-file' that asks to use
   `doc-view' instead of `view-file' if file is a pdf, ps or dvi file.
   This enables users to use the normal `v' command in dired to open
   document files.

The patch is a bit large because the current version was indented with
spaces, this one uses both spaces and tabs (width 8) as it's the default
for emacs.