py23 Use new-style classes

Such that we get the same semantics in both Python 2 and 3.
diff --git a/Lib/fontTools/t1Lib.py b/Lib/fontTools/t1Lib.py
index 02b5257..610c4be 100644
--- a/Lib/fontTools/t1Lib.py
+++ b/Lib/fontTools/t1Lib.py
@@ -43,7 +43,7 @@
 class T1Error(Exception): pass
 
 
-class T1Font:
+class T1Font(object):
 	
 	"""Type 1 font class.