- lazy subtype initialization rna, was initializing every type in bpy.types at startup, which is slow and doesn't allow access to dynamically added types.

- bpy.types isnt a module anymore, defined as its own PyType, getattr looks up the rna collection each time.
- refcounting fixes
- fixe epydoc generation with undefined values

source/blender/python/intern/bpy_util.c

@@ -236,6 +236,6 @@ PyObject *PyObject_GetAttrStringArgs(PyObject *o, Py_ssize_t n, ...)
 	}
 	va_end(vargs);
 	
-	Py_INCREF(item); /* final value has is increfed, to match PyObject_GetAttrString */
+	Py_XINCREF(item); /* final value has is increfed, to match PyObject_GetAttrString */
 	return item;
 }