Redesign battles

[mount2010]

The battling system is very broken right now.

• There's no way to check who you're battling with. This should be listed under #!battle if you're already in a battle.
• There's no way to check the status of your battle. Have you accepted the battle? Is it active - can you #!bstop the battle?
• You should be able to #!bstop a day-old battle regardless of whether it's your turn. Perhaps this was deliberate design (so people can't get out of a battle death just by pausing for a day, and should be forced to take their turn before stopping the battle), but this should be made clearer then.
• Also if you haven't accepted a battle, you have to do #!brefuse instead of #!bstop, which is confusing. I've seen people get confused in rpg-support due to this. The messaging needs to be clarified or the design simplified.

(Also there's the fact that the battles aren't very interesting, though that's a different issue altogether)