Improved clip calendar and clip album error handling.
Improved clip calendar and clip album error handling.

The views now display a more helpful error message when there are no
station/mics, detectors, and/or a "Classification" annotation in the
archive.

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