Avoid printing out spurrious DRUSH_BACKEND packets when talking to an older version of drush in 'interactive' mode.  Spurrious end-of-line characters remain, but this is still an improvement.  (Upgrade the remote drush to get rid of them.)
In drush uli, call remote user-login command with 'integrate' => FALSE to avoid duplicate output.
Enable testing of php 5.4 on travis