adding easyconfigs: libmatheval-1.1.11-foss-2015b.eb,...

adding easyconfigs: libmatheval-1.1.11-foss-2015b.eb, libmatheval-1.1.11-intel-2015b.eb, libmatheval-1.1.11-intel-2016a.eb, libmatheval-1.1.11-intel-2016b.eb, libmatheval-1.1.8-goolf-1.4.10.eb, libmatheval-1.1.8-ictce-5.3.0.eb