Added a listfaq comand to the faq plugin

For the time being it simply makes the bot spit out a list of available faq
entries.

core/plugins/faq.py

@@ -35,6 +35,10 @@ def command_addfaq(self, rest, user, channel):
                 self.faqs[identifier] = answer
                 self.write()
                 channel.msg('Added FAQ entry for %r' % identifier)
+
+    def command_listfaq(self, rest, user, channel):
+        for faq in self.faqs.keys():
+            channel.msg('%s' % faq)
 
     def command_faq(self, rest, user, channel):
         answer = self.faqs.get(rest, None)