Added online leaderboards

I'm happy to announce that the newest version of Mana Squared now has online leaderboard functionality !
To update to the newest version, just use the in-game updater, or download the newest installer from the downloads page.

To make things a bit more smooth to work with, I did have to make it so new (and exists) users are automatically registered online (to get a unique ID).
The list is more or less synced with a online database every time you start the game, or when you made a new entry in your hi-score list.
At this point, the lists are only visible (in a decent way) from inside the game. When/if the game gets more used, I will also add a list to this site.