Merge branch 'master' of https://github.com/Microsoft/pxt-microbit

docs/examples.md

@@ -77,4 +77,25 @@ Here are some fun programs for your @boardname@!
   "url":"/examples/servo-calibrator",
   "cardType": "example"
 }]
+```
+
+## Turtle graphics
+
+```codecard
+[{		
+  "name": "Turtle Square",
+  "description": "move in a square",
+  "url":"/examples/turtle-square",
+  "cardType": "example"
+}, {
+  "name": "Turtle Spiral",
+  "description": "move in a spiral",
+  "url":"/examples/turtle-spiral",
+  "cardType": "example"
+}, {
+  "name": "Turtle Scanner",
+  "description": "scans the screen down",
+  "url":"/examples/turtle-scanner",
+  "cardType": "example"
+}]
 ```