Smaller banners on List View
Renamed ICON_SIZE to BANNER_SIZE
Add Year column

Though I have no idea how to update the local DB to
add the years.
Cleanup List view
Update icons to correct size depending on view

I'm not too sure about that part :
```
def update_image(self, game_slug, is_installed=False):
         row = self.get_row_by_slug(game_slug)
         if row:
-            game_pixpuf = get_pixbuf_for_game(game_slug,
+            game_pixpuf = get_pixbuf_for_game(game_slug,
self.icon_size,

is_installed=is_installed)
```
I'm calling icon_size from the parent class (GameView) of the class
where it's set (TreeView and IconView). It doesn't look right to me
but I don't know how to do it otherwise without duplicating
update_image() in each child class.
Merge branch 'treeview-stuff' of git://github.com/Xodetaetl/lutris into Xodetaetl-treeview-stuff