obj/effect/effect is now renamed obj/effect/particle_effect for better usability.
datum/effect/system and /datum/effect/effect/system are now both /datum/effect_system.
Fixes a bug where wall mounted igniters (and other spark producing objects) didn't produce sparks sometimes.
Moved explosion_particles.dm into the effect_system folder, because it has effect_systems code.
obj/effect/effect all pool themselves.
PoolOrNew() can now be passed a type and a list instead of a type and a location. In that case, the list will be passed to New() via arglist().
RCD's now delete their spark system and properly garbage collect.