copy build to current example directory, otherwise the sample does not run

examples/README.md

@@ -4,6 +4,7 @@ If you have python installed, here are simple steps to do this.
 
 1. Open a terminal shell
 1. Change to the examples directory (.../TimelineJS/examples)
+1. Copy ../build to current directory (cp ../build .)
 1. Type `python -m SimpleHTTPServer 8000`
 1. in your web browser, open `http://localhost:8000/example_json.html` (or whatever other file you want to see
 )