Offline Storage Test

This is a test to:
• Read a conference schedule JSON feed.
• Load the JSON data into local storage.
• Use application cache to save the .css, .js, and some .html files.
• Reload conference schedule data from local storage when offline.

Features to add next:
• Restyle schedule listing as vertical items.
• Upon expanding schedule listing, show venue, speaker, dates, times, and description.
• Update manifest cache files upon file-change detection
• Add alerts for users to indicate whether they are seeing current or cached schedule data.