Mafia: Custom Stalk messages, Simpler needsBot function
Mafia: Adding optional messages for dummy commands

Basically, dummyusermsg/dummy2usermsg/dummy3usermsg sends a message to the user, while dummytargetmsg sends a message to the target and dummybroadcastmsg sends a message to everyone.
Merge pull request #441 from IceKirby/patch-33

Mafia: Custom Stalk messages, Simpler needsBot function, Dummy commands messages