Add __repr__ to mapped classes

This makes string representations of lists, tuples, dicts, etc. with the
DB objects make sense

pokedex/db/tables.py

@@ -62,6 +62,9 @@ class TableSuperclass(object):
     def __str__(self):
         return unicode(self).encode('utf8')
 
+    def __repr__(self):
+        return unicode(self).encode('utf8')
+
 mapped_classes = []
 class TableMetaclass(DeclarativeMeta):
     def __init__(cls, name, bases, attrs):