markov: force the target/context to lowercase

dr_botzo/markov/lib.py

@@ -87,6 +87,8 @@ def generate_sentence(context, topics=None, max_words=30):
 def get_or_create_target_context(target_name):
     """Return the context for a provided nick/channel, creating missing ones."""
 
+    target_name = target_name.lower()
+
     # find the stuff, or create it
     try:
         target = MarkovTarget.objects.get(name=target_name)