Fix PASS (server password)

Totally forgot to hook up the server_password from the factory to the
actual IRC client.

cardinal/bot.py

@@ -54,6 +54,15 @@ def nickname(self):
     def nickname(self, value):
         self.factory.nickname = value
 
+    @property
+    def password(self):
+        """Twisted.IRCClient server password setting"""
+        return self.factory.server_password
+
+    @password.setter
+    def password(self, value):
+        self.factory.server_password = value
+
     @property
     def reloads(self):
         return self.factory.reloads