world_comm => intra_image_comm. Version number updated to 5.1


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10985 c92efa57-630b-4861-b058-cf58834340f0
Cleanup


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10986 c92efa57-630b-4861-b058-cf58834340f0
Correct spelling is "length", not "lenght"


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10987 c92efa57-630b-4861-b058-cf58834340f0