Fix for loading songs with linked audio + test. Fixes bug 1398403
Remove dummy initialization of preview_display to solve issue of mediaplayer preview being hidden.
When cloning a song copy the mediafiles as well. Fixes bug 1309998.
Use shutil.which instead of calling which with check_output, when detecting mudraw/gs.
Moved test service files into appropriate folder.
Set the default song search to search as type.
bzr-revno: 2454