Function to aggregate bloomfilters

[juanpampliega]

Hi,
From my initial assessment there currently is no function to aggregate a column of BloomFilters to generate a new BloomFilter from this aggregation.
Looking at the code a function could be easily implemented that uses internally the putAll() function.
Is there any reason in particular you haven't done this? I could try adding this feature and sending a PR.

[RobinUS2]

Thanks for reaching out @juanpampliega . There's no specific reason for not implementing this, simply a lack of need so far. Feel free to go ahead and implement this one, preferably with a (couple of) test(s) as I could definitely see how this would be helpful.