Possible layout for setting button on poster view of series

This at the moment is really just the design, it doesn't do anything and is intended to be working towards #208.

What this does is add a 'cog' or settings icon to each poster (only posters). The icon is in the top right hand side and I tried to make it as small as possible even though the icon is hidden unless you are hovering over the poster.

As for #208, this is really about all I can do, as for the JS side, I don't fully understand the handling of the DB but as I mentioned in the thread, I don't imagine it's all that complex.