Hack to make bumpversion keep track of doc version

doc/conf.py

@@ -59,7 +59,7 @@ author = u'Pete Shadbolt'
 # built documents.
 #
 # The short X.Y version.
-version = '0.4'
+version = '0.4.18'
 # The full version, including alpha/beta/rc tags.
 release = '0.4.18'