Gold Price 3.0

Gold Price - Current price of gold per troy ounce.
Gold Price Widget checks the current price of a troy ounce of gold (or gram) every 30 minutes and displays its value.
If the price is higher or lower then the average of the last last 10 prices, then an arrow reflecting this change is shown next to the price.
Enhancements:
- Added Australia theme
- Added ounces per dollar display
- Added grams per dollar display
- Improved how update notices are downloaded.