Added diona gestalt preset.

code/modules/materials/materials.dm

@@ -326,6 +326,20 @@ var/list/name_to_material
 	icon_reinf = "reinf_over"
 	icon_colour = "#666666"
 
+/material/diona
+	name = "biomass"
+	icon_colour = null
+	stack_type = null
+	integrity = 600
+	icon_base = "diona"
+	icon_reinf = "noreinf"
+
+/material/diona/place_dismantled_product()
+	return
+
+/material/diona/place_dismantled_girder(var/turf/target)
+	spawn_diona_nymph(target)
+
 /material/steel/holographic
 	name = "holo" + DEFAULT_WALL_MATERIAL
 	display_name = DEFAULT_WALL_MATERIAL