Aggregate plugin: min, max, average, count, median, mode, range, sum

I've been working on a plugin I call aggregate. This includes an option to count elements, but it has also options for "average", "max", "min", "median", "mode", "range" and "sum".

Code will come shortly.

For the count function, I have not implemented the option to count recursively yet. I'll try to add that one later today or tomorrow.

I've added the option to use 'count' in recursive mode now.

Great work! Rebased + approved but it didn't let me merge. Will check back soon to see if thats just a temporary thing in Gitlab.

I merged the code!

Automatically closed - issue fixed for 2 weeks with no activity.