rna api

- move: material.add_texture(tex, coords, mapto) --> material.texture_slots.add()
- added material.texture_slots.create(index), material.texture_slots.clear(index)
- texture slot functions also work for lamp and world now.

Other minor changes
- allow rna functions to set FUNC_NO_SELF and FUNC_USE_SELF_ID at once.
- [#23317] Changed some operators' RNA to accept lengths, a modification I made to this patch made it not work as intended, removed this edit so unit buttons appier in the UI for certain operators.
- Sphinx doc gen, 2 columns rather then 3, didnt quite fit in some cases.

source/blender/makesrna/intern/rna_world.c

@@ -469,8 +469,8 @@ void RNA_def_world(BlenderRNA *brna)
 	RNA_def_struct_ui_icon(srna, ICON_WORLD_DATA);
 
 	rna_def_animdata_common(srna);
-	rna_def_mtex_common(srna, "rna_World_mtex_begin", "rna_World_active_texture_get",
-		"rna_World_active_texture_set", "WorldTextureSlot", "rna_World_update");
+	rna_def_mtex_common(brna, srna, "rna_World_mtex_begin", "rna_World_active_texture_get",
+		"rna_World_active_texture_set", "WorldTextureSlot", "WorldTextureSlots", "rna_World_update");
 
 	/* colors */
 	prop= RNA_def_property(srna, "horizon_color", PROP_FLOAT, PROP_COLOR);