ADDED the Infinity string bug replacement

Sometimes factfinder returns a json string with an inifinity string represenation ("Infinity"). This causes a Exception, which can be caught but the data itself is OK. So replace simple INF with 0.
The string replacement of `Infinity` causes problems when for instance `Infinity` is part of the product description.

```javascript
{
    "Description": "This product is Infinity good"
}
```

will be replaced to:

```javascript
{
    "Description": "This product is "0" good"
}
```

The `json_decoded` will return NULL because the json string is invalid.