Allow (de)serialising True & False built-in instances.

src/zc/buildout/buildout.py

@@ -62,6 +62,8 @@ class BuildoutSerialiser(object):
         'list': list,
         'str': str,
         'tuple': tuple,
+        'False': False,
+        'True': True,
     }}
 
     def loads(self, value):