The data series it now in javascript format

The data series (self.series) was in python format, in example:

    {'y': 6, 'x': 1338501600000L}

Now it's in javascript format, in example:

    {'y': 6, 'x': 1338501600000}

The default examples (linechart, linewithfocuschart) were failing ('Uncaught SyntaxError: Unexpected token ILLEGAL') because of the invalid js.