Description of problem:
Nobody who is authoring PDF files can currently use evince.  The problem is that
evince cannot deal with changing files.  Create a PDF file (e.g., with pdftex),
start envince, change the file and recreate.  The result is lots of garbage on
the console and no more out.

xpdf at least has the possibility to to reload the file with a single key press.
 This is needed in evince, too.  It is not acceptable to have evince reload the
file automatically.  Often enough I want to look into the old file which has
been overwritten.

I suggest to extend evince to
a) add a single key press reload function (please no Ctrl-<something>)
b) recognize the file data has changed and in this case only use the data which
is available in memory and not reading anything new.

Version-Release number of selected component (if applicable):
evince-0.1.4-1

How reproducible:
always

Steps to Reproduce:
1.echo 'foo\eject{}bar\bye' > a.tex
2.pdftex a.tex
3.evince a.pdf&
4.echo 'foo\bye' > a.tex
5.pdftex a.tex
6.press "page down" in evince

  
Actual results:
no output anymore

Expected results:
old document displayed, or warning message printed, no console output

Additional info:
This is a critical feature for anybody authoring PDFs.  acroread is not usable
for the same reason.