Changed the additional components to be installed
Changed the additional components to be installed

The right component to be installed is "app" and not "preview", the "preview" component has disappeared.
pengsrc/dpl,testfairy/dpl,Misfit-SW-China/dpl,georgantasp/dpl,testfairy/dpl,jonathan-s/dpl,computology/dpl,mathiasrw/dpl,travis-ci/dpl,travis-ci/dpl,mattk42/dpl,travis-ci/dpl,testfairy/dpl