Bins items into a discrete histogram by values and/or ranges.

        items = [1, 2, 3, 4, 5, 6, 7]
        bins = [0, 1, 2, (3, float('inf'))]
        ut.range_hist(items, bins)

def range_hist(items, bins):
    """
    Bins items into a discrete histogram by values and/or ranges.

        items = [1, 2, 3, 4, 5, 6, 7]
        bins = [0, 1, 2, (3, float('inf'))]
        ut.range_hist(items, bins)
    """
    big_hist = ut.dict_hist(items)
    hist = ut.odict([(b, 0) for b in bins])

    for k, v in big_hist.items():
        for b in bins:
            if isinstance(b, (list, tuple)):
                if k >= b[0] and k < b[1]:
                    hist[b] += v
            elif k == b:
                hist[b] += v
    return hist