Range generator

[dmfs]

In order to iterate ranges of values, I want a Range generator.

We can consider to make it very generic by accepting a Function which returns the next value and a Comparator to determine when the end is reached (or only support Comparables). Not sure if that would be too much though.

[dmfs]

The basic idea would be this:

public final class Range<T extends Comparable<T>> implements Iterable<T>
{
    public Range(T start, T end, Function<T, T> stepFunction)
    {
       …
    }
}

This should work for Integer and Long but also for Float and String

[dmfs]

duplicate of #88