Adding calculation of Z2 topological invariant according to
PRB 83, 235401 (2011). The routine is coming soon.


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10621 c92efa57-630b-4861-b058-cf58834340f0
Simplified

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10622 c92efa57-630b-4861-b058-cf58834340f0
QE-GPU repository (temporary) removed from svn:externals

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10623 c92efa57-630b-4861-b058-cf58834340f0
Energy wasn't calculated properly with EXX and Gamma point (potential 
still isn't). I don't understand why a minus sign is apparently needed. 
In my opinion it shouldn't be there.


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10624 c92efa57-630b-4861-b058-cf58834340f0
Found origin of mysterious minus sign in calculation of EXX energy with USPP


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10625 c92efa57-630b-4861-b058-cf58834340f0
Missing deallocation leading to memory leaks. More fixes for gamma-only EXX
with USPP, still not working


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10626 c92efa57-630b-4861-b058-cf58834340f0
More fixes for US+EXX (still not working)


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10627 c92efa57-630b-4861-b058-cf58834340f0
EXX+USPP+Gamma with real-space augmentation charges seems to work now
(reciprocal-space version not yet)  


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@10628 c92efa57-630b-4861-b058-cf58834340f0