Fixed bug #40, when axis pad, padMax, padMin set to 0, graph would fail to render.  Now 0 means the same thing as 1.0.
Fixed bug #40, when axis pad, padMax, padMin set to 0, graph would fail to render.  Now 0 means the same thing as 1.0.

harbulot/jqplot,harbulot/jqplot,harbulot/jqplot