Tidied python plugins

Use private naming convention
Move local callback functions to top

emoticons.py

@@ -1,6 +1,6 @@
 import prof
 
-def emote(input_str):
+def _emote(input_str):
     result = input_str
     result = result.replace(":-)", u'\u263a')
     result = result.replace(":)", u'\u263a')
@@ -8,6 +8,5 @@ def emote(input_str):
     result = result.replace(":(", u'\u2639')
     return result
 
-
 def prof_before_message_displayed(message):
-    return emote(message)
+    return _emote(message)