Fixes small kinematic inaccuracy in EMC and ZEUS F2b data sets
This PR propagates NNPDF/buildmaster#141.
Dear OCCAM's users, since late this afternoon we've been experiencing access problems on /archive Storage. That's why the ssh connections to the frontend hangs indefinitely. As soon as possible we'll try to diagnose this fault and solve it.
This PR propagates NNPDF/buildmaster#141.