Replaced the icon with a more generic tiger pawprint so that I'm not using an RIT trademark, so that I'm prepared for the first App Store release. Also added information about where menu information is being sourced from on the about screen, and fixed a bug where vegetarian/vegan/no beef/no pork toggles would not be written to UserDefaults.
- Visiting chef screen now shows "No visiting chefs today" instead of nothing when there are, get this, no visiting chefs today
- 24-hour locations (Bytes) will no longer show as "Closing Soon" for the last 30 minutes of the day only to reset back to "Open" at midnight
- The app will now display a network error instead of loading indefinitely if an error occurs while fetching dining data
- Other minor spacing and layout changes
