made attributes (name, property, users, fakeUser, lib) into functions all python types can use.

removed a lot of code duplication when moving to this.
Also removed unused functions GetMaterialByName(), same for Mesh, Object, World etc.

source/blender/python/api2_2x/Object.h

@@ -55,7 +55,6 @@ PyObject *Object_Init( void );
 PyObject *Object_CreatePyObject( struct Object *obj );
 Object *Object_FromPyObject( PyObject * py_obj );
 int Object_CheckPyObject( PyObject * py_obj );
-Object *GetObjectByName( char *name );
 
 void Object_updateDag( void *data );