[Feature] require sass-css-importer
[Feature] require sass-css-importer

refs #41

markusfalk/generator-kickstart,webit-de/generator-kickstart,webit-de/generator-kickstart,OpenSourceWorkflow/generator-kickstart,markusfalk/generator-kickstart,OpenSourceWorkflow/generator-kickstart,OpenSourceWorkflow/generator-kickstart,markusfalk/generator-kickstart