Add non-retina version of the lab header image
Add non-retina version of the lab header image

NielsLeenheer/html5test,ya7lelkom/html5test,ya7lelkom/html5test,NielsLeenheer/html5test,chiefcll/html5test,chiefcll/html5test,chiefcll/html5test,NielsLeenheer/html5test,mpopp75/html5test,mpopp75/html5test,mpopp75/html5test,ya7lelkom/html5test