adding easyconfigs: mympingpong-0.8.0-intel-2017a-Python-2.7.13.eb,...

adding easyconfigs: mympingpong-0.8.0-intel-2017a-Python-2.7.13.eb, mpi4py-1.3.1-intel-2017a-Python-2.7.13-timed-pingpong.eb, lxml-4.0.0-intel-2017a-Python-2.7.13.eb, libxml2-2.9.5-GCCcore-6.3.0.eb, libxslt-1.1.30-intel-2017a.eb