Renamed factory spawn

Author: britzl

factory_basic/example/spawn.md renamed to factory_basic/example/basic.md

@@ -5,7 +5,7 @@ brief: This example shows how to dynamically spawn game objects with a factory c
 scripts: bunny.script,carrot.script
 ---
 
-![spawn](spawn.png)
+![basic](basic.png)
 
 The "carrotfactory" factory component uses the file *carrot.go* as prototype, meaning that it produces game objects that are all copies of that file.