Multiples validator only works for Ints

[AdriaanRol]

The Multiples(Ints) validator checks if a give value is a multiple of some other value (the divisor).

This validator only works for Ints and there is no reason for this.

A perfectly valid example would be requiring for values to be multiples of 20ns.

The current value would then be valid 40e-9 as this would return 0.0. Currently this will raise an error as 40e-9 (which is a multiple of 20e-9) raises an error as it is not an Int. I propose dropping the constraint of it having to be an Int.

[jenshnielsen]

Thats sensible enough but we will need to be careful about the implementation
as floating point math cannot be assumed to be distributive. For example

In [1]: divisor = (1/3)*1e-10
In [2]: print(((1/3)*1e-9)%divisor)
3.333333333333331e-11

[WilliamHPNielsen]

@AdriaanRol I'll put up an extra validator, PermissiveMultiples, for this on Monday.