fixing Plot.candle_plot() method to properly handle setting color and bar_color to 'auto'
fixing Plot.candle_plot() method to properly handle setting color and bar_color to 'auto'

burnpanck/chaco,burnpanck/chaco,ContinuumIO/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,ContinuumIO/chaco,tommy-u/chaco,tommy-u/chaco,burnpanck/chaco