Add SeleniumBase "Presenter"
- Add a tool for making HTML presentations
New methods:
self.create_presentation(name=None, show_notes=True)
self.add_slide(content=None, image=None, code=None, iframe=None, notes=None, name=None)
self.save_presentation(filename="my_presentation.html", name=None)
self.begin_presentation(filename="my_presentation.html", name=None)