Change names of exported clip HDF5 files.
Change names of exported clip HDF5 files.

The date is now last in the names. This is consistent with the names of
exported clip audio files, and I think is what users are likely to
prefer.

HaroldMills/Vesper,HaroldMills/Vesper,HaroldMills/Vesper,HaroldMills/Vesper,HaroldMills/Vesper