Add dynamic max aggregator
Add grabber utility package
Switch max aggregator to use grabbers
Extract default error handling behaviour from Max into a superclass
Switch min aggregator to use grabbers and remove now unused ExtremumInterceptor class
Move warn suppress to method declaration in grabber
Remove unused interceptor and its superclass
Move StubAggregator to separate package and rename to Invoker
Migrate DynamicInterceptor to Flat and clean up remnants of the old design