creative changer config

ventory-changing mods
--or games, you must change the above to the formspec definition for that mod and remove it
--from their mod.

--NOTE: At the moment, the creative formspec cannot be changed, as it is required to use variables inside the mod.
--You can try to change it, but it probably will not work.  The same is true for a survival inventory with variables,
--such as inventory_plus.  It is still possible to change the SURVIVAL_FORMSPEC variable inside the code to cope
--with this, but it will not be easy.