1.5.4 Final

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@582 98b4c264-8670-11de-a133-9d545b4d7674
Better spacing in logged messages.

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@583 98b4c264-8670-11de-a133-9d545b4d7674
Resolve ARC related crash when transitioning to the next download.

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@584 98b4c264-8670-11de-a133-9d545b4d7674
Time remaining algorithm improvements.

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@585 98b4c264-8670-11de-a133-9d545b4d7674