Homepage updated

I have updated the homepage.
- Uses the latest layout.
- There is a new "popular games" section, automatically updated weekly.
- The "groups" showcase now shows three of them, also removed the games preview.
- The anniversaries section shows just the most notable, along with a link to a more exhaustive page.
- The news/forum is almost the same.
- The page content is updated every hour.

Is it working as intended that the "more exhaustive page" shows the package images mainly? I would have expected to show the main ingame screenshot.

Yes, I'm going to make it optional, but I wanted to see how it looks now that we have enough cover images (a few years ago it wasn't possible)
The in-game image remains the main image anyway.

Now the default view is in-game again, but now there are the other view options.

It could be a site-wide option that applies to other pages too. We'll see.