- convert mesh_modifier to return deformed verts instead of

leaving in a DL_VERTS type displist (and modifying mesh)
 - removed DL_VERTS displist type (woot woot)
 - makeDispListMesh now puts deformed verts in object->derivedDeform
 - switch over other system parts to new deformed vert storage,
   still kinda hacky and maybe some inconsistencies... will be
   sorted out soon enough.
 - moved build_particle_system to makeDispListMesh... this may have
   adverse side effects, needs to be sorted out with depgraph system

source/blender/src/drawmesh.c

@@ -885,9 +885,10 @@ void draw_tface_mesh(Object *ob, Mesh *me, int dt)
 			dm = mesh_get_derived(ob);
 			dm->drawFacesTex(dm, draw_tface_mesh__set_draw);
 		} else {
-			dm = mesh_get_base_derived(ob);
+			int dmNeedsFree;
+			dm = mesh_get_derived_deform(ob, &dmNeedsFree);
 			dm->drawFacesTex(dm, draw_tface_mesh__set_draw);
-			dm->release(dm);
+			if (dmNeedsFree) dm->release(dm);
 		}
 
 		start = 0;