Created a PR for two new Sling Archetypes: https://github.com/apache/sling/pull/237
Both Archetypes are creating a project using Content Packages. The 'project' provides the traditional core / ui.apps where core is embedded into the ui.apps package. The 'project-all' is creating a wrapper 'all' content package that contains both the core bundle and the ui.apps package.
The generated projects require WCMIO Content Package Plugin 1.5.0 which needs to be download and installed locally first.