Show the current hit-rate for today's level

* Fetch from the server.
* "43 of 1343 wins 40%"
* Could also show yesterday's stat.

Requested by a player:

> it might come up with a report like:
>
> * You escaped the dungeon. 60% of players escaped
> * You collected 12 items. The average number of items collected was 10
> * You took 123 steps - the average number of steps was 100
> * You killed 7 baddies - the average number killed was 4