Set the maxStackSize to 1

Still looking for a way to change this value depending on the
metadata(no getter for this value has a parameter for)
Revert "Set the maxStackSize to 1"

This reverts commit bd644b33f2ee87e92311cf65b99dd2f81d2c9462.
Revert "Added a one itemid system to the research module"

This reverts commit 787687c9d79730d6557473880bf9f4afb2b47a30.