Allows the user to add tour steps for a website.
            @Params
            message - The message to display.
            selector - The CSS Selector of the Element to attach to.
            name - If creating multiple tours at the same time,
                   use this to select the tour you wish to add steps to.
            title - Additional header text that appears above the message.
            alignment - Choose from "top", "bottom", "left", and "right".
                        ("top" is the default alignment).
            duration - (Bootstrap Tours ONLY) The amount of time, in seconds,
                       before automatically advancing to the next tour step.

def __add_bootstrap_tour_step(self, message, selector=None, name=None,
                                  title=None, alignment=None, duration=None):
        """ Allows the user to add tour steps for a website.
            @Params
            message - The message to display.
            selector - The CSS Selector of the Element to attach to.
            name - If creating multiple tours at the same time,
                   use this to select the tour you wish to add steps to.
            title - Additional header text that appears above the message.
            alignment - Choose from "top", "bottom", "left", and "right".
                        ("top" is the default alignment).
            duration - (Bootstrap Tours ONLY) The amount of time, in seconds,
                       before automatically advancing to the next tour step.
        """
        if selector != "html":
            selector = self.__make_css_match_first_element_only(selector)
            element_row = "element: '%s'," % selector
        else:
            element_row = ""
        if not duration:
            duration = "0"
        else:
            duration = str(float(duration) * 1000.0)

        step = ("""{
                %s
                title: '%s',
                content: '%s',
                orphan: true,
                placement: 'auto %s',
                smartPlacement: true,
                duration: %s,
                },""" % (element_row, title, message, alignment, duration))

        self._tour_steps[name].append(step)