Please someone upgrade sagenb so it has R graphics support

[kcrisman]

See for instance http://ask.sagemath.org/question/1102/using-r-in-sage-can-not-plot-errors-of-x11-and-png

I've had this problem giving talks to (otherwise friendly) R audiences
and had to sort of skirt the issue. Given Jason and Volker's work
tracking this down, I don't think it should be too hard to "sage -f r"
after installing pango and cairo or whatever's needed. Or so I'm
told :)

- kcrisman

[Keshav Kini]

William did this, apparently. https://groups.google.com/d/msg/sage-devel/2aANS7hEdMQ/E7WiRKN5Q4EJ

-Keshav

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