generic web front-end with demo app

This distro contains a generic framework for developing web front-ends to REST resources. The framework includes a web server (based on Plack and Web::Machine), CSS and HTML for the "frame" where the application displays its screens, and "widgets" for defining the application's login dialog, menus, forms, and actions. 

For illustration, the distro contains a demo app that works with App::Dochazka::REST.