README.md in onnxruntime-0.2.3 vs README.md in onnxruntime-0.3.0

@@ -35,13 +35,19 @@
 
 ```ruby
 model.outputs
 ```
 
+Get metadata
+
+```ruby
+model.metadata
+```
+
 Load a model from a string
 
 ```ruby
-byte_str = File.binread("model.onnx")
+byte_str = StringIO.new("...")
 model = OnnxRuntime::Model.new(byte_str)
 ```
 
 Get specific outputs