Hi internals, I've been working on improving performance of BCMath lately, and I found that I can get the div and mod in one calculation. This is obviously faster than calculating it twice separately.
Do you think there's a demand for this feature?
e.g.
```
[$quot, $rem] = bcdivmod('123', '2');
// $quot is '61', $rem is '1'
```
The naming and return value scheme is inspired by Python and Ruby.
Of course, if this is added, equivalent functionality will be added to the
Number class.
Regards,
Saki
