revert back to sol2

src/scripts/demos/simple_001.lua

@@ -2,20 +2,26 @@
 -- small demonstrator for Lua binding on pixwerx
 --
 
--- loading our libraries
 pw.script:load_all()
 
 print("hello pixwerx!")
 
 local s = pw.scene.new()
 
-e = pw.entity.new(s)
-e2 = pw.entity.new(s)
+print(s)
+
+local e = pw.entity.new(s)
+c = pw.entity.new(s)
 
 print(e)
-e2.add_child(e)
+print(e.child_count)
 
--- print(s)
--- print(e2.child_count)
+-- add child
+e.add_child(c)
 
 
+print(e.child_count)
+
+print("bye, bye pixwerx!")
+
+return 1