new file:   php/dist/excanvas.min.js
	modified:   php/index.php
	modified:   php/js/barchart.js

	We needed to add excanvas.min.js so that we could render the
	bar charts in IE.  Also some cleanup to the barchart.js was needed
	since IE chokes when it's not happy.  Conditional include added to
	index.php