Added an instruction to do with code snippets to the readme

Author: alcarney

index.md

@@ -3,3 +3,14 @@
 Meeting time: Thursdays at 1600
 
 (There might be doughnuts)
+
+## Code snippets
+
+To embed code snippets from this repository into a webpage you can use the 
+following code
+
+```
+    <script src="http://gist-it.appspot.com/github/robertkrimen/gist-it-example/blob/master/example.js?footer=0"></script>
+```
+where you replace everything after github/ with the address of the repository and the file within the repository that contains
+the code you wish to add