Don't reuse damage_per_second for damage on punch and radiant
damage. This allows these to be defined separately, i.e. no longer
assuming that all damage is from "heat" and can radiate. This
allows for things like thorny plants that hurt if you touch them
or stand in them but not if you stand near them.
Thanks to WintersKnight94 for reporting this.
This freezes many things that normally happen automatically
in the world, including most ABMs and AISMs, and a few other
custom step logic items like the player "hot potato" logic.
This can be used for "creative mode" purposes to setup a complex
build without it running itself away from you, and for texture
pack authors, to have time to see things that are normally
transient or difficult to observe because of the effects they have
on nearby things or players.
