2 new number matchers (test if a number is an interger or a float)

Hello,

It's sometime usefull to test if a number is an _integer_ or a _float_.
Perhaprs a good idea to add **IsIntMatcher** and **IsFloatMatcher**

I gave you the correct functions below:
    function isInt(value:Number):Boolean
    {
        return (value % 1 == 0);
    }

```
function isFloat(value:Number):Boolean
{
    return (value % 1 != 0);
}
```

Thanks !
