let grunt add an application cache file to all pages (see msg)

add 'manifest' task to Gruntfile.js, which creates an application cache file called 'manifest.appcache'. the file allows all HTML, CSS & JS pages and SOME images to be stored for offline use. add the task to the registered 'push' task. list the task's dependency ('grunt-manifest') in 'package.json'. link 'manifest.appcache' to all pages via the three layouts.