... and this is the routine. Documentation and example are
on the way.


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10629 c92efa57-630b-4861-b058-cf58834340f0
Tkatchenko-Scheffler in PW as well. Will likely need some more tweaking 
but it is already sort of working (courtesy of Simone Piccinin) 


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10630 c92efa57-630b-4861-b058-cf58834340f0