found how to make both latex and pdflatex happy (just write the file
name with no extension and provide both postscript and PNG)
various reformatting and cleanup of the manual (no more "overfull
hbox"'s)
[Gerardo]
git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@1106 c92efa57-630b-4861-b058-cf58834340f0
ballabio