[Fix] Reordering the currency symbol in the Italian currency formatter

Using the current currency formatter from `it.js` currencies are wrongly rendered since the currency symbol is placed before the number instead of being placed after it.

Eg.
```js
var fmt = new TwitterCldr.CurrencyFormatter();
fmt.format(1337, {currency: "EUR"});
```
should print `1.337,00 €` but prints `€ 1.337,00` instead. This behaviour differs from the one of the [twitter-cldr-rb](https://github.com/twitter/twitter-cldr-rb) gem.

This commit fixes the difference and makes twitter-cldr-rb and twitter-cldr-js output currencies in a coherent format.