Bugtracker: Various improvements.

* Add option to set aliases on trackers.
* Complete removal and renaming of trackers.
* Only load default trackers if none set yet.
* Improve handling of auto-discovered trackers.
* Add function to reset trackers to defaults.
* Minor fix to Encyclopedia along the way.

Encyclopedia/plugin.py

@@ -432,7 +432,7 @@ class Encyclopedia(callbacks.Plugin):
             return
         if not text:
             return
-        if text.split()[0].lower() in tuple(self.registryValue('ignores', channel)):
+        if text.split()[0].lower() in self.registryValue('ignores', channel):
             return
 
         doChanMsg = True # Send message to channel