Update README for v0.3.1
diff --git a/README.md b/README.md
index 094c1a0..3bdc167 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@
 
 ### develop
 
+### v0.3.1
+
+- Add Evaluation module and modify DataSource for it
+
 ### v0.3.0
 
 - update for PredictionIO 0.9.2, including: