add install doc link

Neutree · Neutree · commit c5023445b43a · 2019-04-03T15:20:50.000+08:00
diff --git a/README.md b/README.md
@@ -8,6 +8,9 @@ Arduino core for Maix Board (K210)
 
 Docs: [maixduino.sipeed.com](https://maixduino.sipeed.com/)
 
+## Install
+
+Refer install doc: [Install](https://maixduino.sipeed.com/en/get_started/install.html)
 
 
 ## Other SDK
