Add listdir_iter to sftp_client.SFTPClient
Remove some debug stuff I inadvertently left in and remove some confusing comments
Add python 2.5 support except block to listdir_iter
Merge branch 'master' into 131-int
Update docstring for listdir_iter
80-col tweaks
Add quick test re #131
Merge branch 'master' into 131-int
Make read ahead kwarg a bit less verbose
Changelog re #131