Rename the lightweight object type.

Few adjustments to the tasks to overcome the limitation of removing themselves. Currently broken because they require a special Sqrat allocator.

source/SqBase.hpp

@@ -140,8 +140,8 @@ namespace Sqrat {
     class Object;
     class Table;
     class Function;
+    class LightObj;
     class StackStrF;
-    class LightObject;
 } // Namespace:: Sqrat
 
 /* ------------------------------------------------------------------------------------------------