Add some style options for Author Lists

[stevejburge]

Let's add some basic style options for Authors Lists.

For example, controlling if the title is h1, h2 etc. Or adding / hiding the title

[ojopaul]

@stevejburge Author Lists title doesn't show in the display or what title are you talking about?

[stevejburge]

I was thinking of adding some style options similar to Author Boxes, but let's postpone this one