Updated module 4 slides.
Updated module 4 slides.

lkduerig/angularjs-training,ilmaliek/angularjs-training,gofore/angularjs-training,gofore/angularjs-training,ilmaliek/angularjs-training,lkduerig/angularjs-training,ilmaliek/angularjs-training,lkduerig/angularjs-training