[Success!] [MERGE] Write status messages in push to stderr rather than stdout

[Bundle Buggy]

This change has been merged.
Previous status: Approved

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1234226331.29642.38.camel%40ganieda.vernstok.nl%3E
Project: Bazaar