challenge use case

[GoogleCodeExporter]

1.user login, if a challenge was on, show alert message
2.if user doesn't have challenge on, can start challenge to anybody above 
who's available
3.a message will be sent to the defender, and the challenge will be 
automatically on.
4.email communication still necessary.
5.once match reported,  challenge message will be off the screen

Original issue reported on code.google.com by will....@gmail.com on 4 Jun 2010 at 8:41

[GoogleCodeExporter]

Original comment by will....@gmail.com on 4 Jun 2010 at 8:42

• Changed state: Started
• Added labels: Priority-Critical