Variable pdl_tot (total Berry phase) put in a module 
to be usable by other routines.
world_comm transformed in intra_image_comm.


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11033 c92efa57-630b-4861-b058-cf58834340f0
rVV10 problem: kernel table file was neither written to nor read from data
directory. Maybe it would be smarter to have a "is_nonlocal" variable instead
of testing for inlc==1,2,3,N, not to be forgotten every time a new functional
is added


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11034 c92efa57-630b-4861-b058-cf58834340f0