Processing a bunch of Update in a single Transaction

[balanka]

Currently ZTransaction provides apply method taking a single Update[A] element as parameter.
Therefore you can process only a single update/insert/delete.etc..no batch.
It would be great, if ZTransaction additionally provides an apply method taking a list of parameter, allowing Update to be processed in aatch.
It would be great if the resulting ZTransaction would accumulate the results yielding ZTransaction[Any, Exception, Int]