updated packing list

More rainy-day astronomy stuff. Reorganised my packing list. I had everything there essentially but not in a logical order given the shuffling done over the last couple of years with new cases, new toolboxes, new carrying bags, etc. New eyepiece case. The strangest thing I ran into was not finding the battery power tank listed. I guess I never added it. The entry for the old Century Booster Pac was probably enough of a trigger...