Fix interactive prompt problem after move to python-six

The previous fix was also required for that file. Adding.
LP: 1373451

Author: Louis Bouchard <louis.bouchard@canonical.com>
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1373451

Signed-off-by: Louis Bouchard <louis.bouchard@canonical.com>
merge patched-ubuntu/precise into ubuntu/precise
Updated changelog for first version sent to PPA

Signed-off-by: Louis Bouchard <louis.bouchard@canonical.com>
Additional changelog update

Signed-off-by: Louis Bouchard <louis.bouchard@canonical.com>