Doesn't work properly with last vers. of ggplot

[puhoshville]

For solving this problem I'm reinstall to ggplot v. 0.6.8:
pip remove ggplot
pip install ggplot==0.6.8

Problem is in the lack of ggsave function in last versions.

[tensorstrings]

Fix by changing the function, refresh, into:

def refresh(self, data):
    """Generate a new image, then tell the page to change the src"""
    h = hashlib.md5(str(data.__dict__)).hexdigest()
    print h

    outfile = os.path.join(self.plot_dir, h + "." + self.extension)

    if not os.path.exists(outfile):

        if self.plotter == "custom":
            kwargs["__outfile"] = outfile

        if self.plotter == "matplotlib":
            from matplotlib import pyplot as plt
            plt.clf()

        ret = self.plot(data)
        if ret is None:
            # don't change the plot at all
            return {self.name: {}}

        # after
        if self.plotter == "matplotlib":
            plt.savefig(outfile)
        elif self.plotter == "ggplot":
            ret.save(outfile)                        ## fixed to updated ggplot save function instead of phased out ggsave function

    # turn into a URL, add a dummy param to avoid browser caching
    url = outfile.replace(os.path.sep, "/")
    url = url + "?dummy=" + str(random.random())

    return {self.name: {"src": url}}