Architectural improvements, and a new way of getting weather data.
- Switched from using Weather Underground's XML API to their JSON one.
- This doesn't affect functionality, though it does bring a very small reduction in data usage.
- Another side effect: the "Root element is missing" issue should no longer occur.
- Rewrote the way the app stores, handles, and retrieves settings.
- Fixed an issue involving Live Tiles for locations with "/" in their names.