Zend Framework Skeleton Application 3.0.0

This release updates the skeleton application to zend-mvc v3.0, with the following additional changes:

• No more dependency on the zendframework package; instead, it only defines dependencies on the minimum set of components needed to execute a zend-mvc application.
• Adds dependencies on zend-component-installer and zend-skeleton-installer; the latter prompts for additional packages to install, and the former auto-registers them with the MVC.
• Adds a dependency on zf-development-mode, allowing users to toggle development mode settings.
• Adds unit testing scaffolding for the application.
• Adds docker-compose and vagrant configuration, to provide workable, default development environments out-of-the-box.