Refs #4041, removed Visualizations\Chart\* classes and moved Visualization\Chart to CoreVisualizations plugin and removed graph_width/graph_height visualization properties in favor of CSS solution.
Merge branch 'master' into treemap
Refs #4041, added Graph base visualization to hold visualization properties that are not specific to jqplot graphs.
Merge branch 'master' into treemap
Make treemap derive from Graph visualization.