Adding zipped build directory

The build directory contains the exact version of the YUI3 framework
used in this course. The example files may or may not work with
different versions of the framework.
Adding the example files from the course

All of the example files created during the course. You are encouraged
to create your own versions of these files as you watch each lesson in
the course. These files are provided for reference only.
Added instructions for running the example files