added error throwage in image.js
added error throwage in image.js

kalabox/kalabox-cli,ari-gold/kalabox,joshkoenig/kalabox,joshkoenig/kalabox,oneorangecat/kalabox,ManatiCR/kalabox,rabellamy/kalabox,ari-gold/kalabox,kalabox/kalabox-cli,RobLoach/kalabox,rabellamy/kalabox,oneorangecat/kalabox,RobLoach/kalabox,ManatiCR/kalabox