Install helper apps to lib64 for 64bit linux builds


git-svn-id: http://cantata.googlecode.com/svn/trunk@5650 b1e49159-3266-923f-9c3e-04f16369770a
In tag editor, only mark rating as changed if it has been.


git-svn-id: http://cantata.googlecode.com/svn/trunk@5651 b1e49159-3266-923f-9c3e-04f16369770a