Enable jqplot charts to be visible in IE8

https://bugzilla.redhat.com/show_bug.cgi?id=1058261
 Enable ziya charts to be visible in IE8

https://bugzilla.redhat.com/show_bug.cgi?id=1058261
Merge pull request #296 from bmclaughlin/ie8-dashboard-widget-fix

Make Dashboard charts visible in IE8