Changes in version 0.3 (2015-06-16)                   

    o   Added support for "ellipse" node shape

    o   Removed 'phantom edges' from undirected graphs

    o   Added agopenSized() function to create Ragraph objects whose
	size is determined by graphviz

    o   agopenSized also passes edge weight information through
	properly, resulting in nicer looking graphs

    o   Added graphWidth and graphHeight functions to get graph
	dimension details easily for plotting

    o   Plot Ragraph objects at their specified size rather than
	fitting to the graphics device

    o   Added support for triangle, pentagon, hexagon, septagon,
	octagon, diamond and square node shapes

    o   Added support for edge labels

    o   Added support for dot/odot and box/obox arrow types

    o   Arrow length for "open" and "closed" arrows set to graphviz
	default, now handles arrowsize better

    o   Improved naming of grobs

    o   Named the graph viewports

                         Changes in version 0.2                         

    o   Handle node 'col' or 'fill' of ""

    o   Handle arrowsize more sensibly

    o   Support for arrowhead="dot"

    o   New argument 'nodesOnTop' for grid.graph() so that user can
	control whether nodes or edges are drawn last (on top).