Error out tracebacks when util fails

The util library originally developed by krowbar and with my
modifications isn't the most perfect thing, and I break it a bit.

plugins/tilde.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python3
 
+import traceback
 import pinhook.plugin
 import util.tilde
 
@@ -28,7 +29,12 @@ def tilde_guess_plugin(msg):
     if util.tilde.ADMIN_ONLY and msg.nick not in msg.ops:
         return
     if msg.nick in util.tilde.challenges and (msg.channel == util.tilde.GOOD_CHAN or util.tilde.DEBUG) and not msg.text.startswith('!'):
-        chalres = util.tilde.challenge_response(msg.nick, msg.timestamp, msg.text)
-        resp = pinhook.plugin.message(chalres[0])
-        return resp
+        try:
+            chalres = util.tilde.challenge_response(msg.nick, msg.timestamp, msg.text)
+            print(chalres)
+            resp = pinhook.plugin.message(str(chalres[0]))
+            return resp
+        except Exception as e:
+            print(traceback.format_exc())
+            return pinhook.plugin.message(str(e))
 

requirements.txt

@@ -10,3 +10,5 @@ requests>~2.20.0
 tvdb-api~=1.10
 zalgotext~=0.2.0
 python-dateutil
+traceback
+importlib