Revision history for Store-Directories

0.3     January 12, 2021
        - Fixed being unable to create locks if you extending the
          Store::Directories class.
        - run_in_dir, get_in_dir and get_or_set methods allow for an init callback
        - get_or_add and remove methods won't get a new __LISTING__ lock
          if you already have one
        - Most callback functions now include key in arguments
0.2     January 7, 2021
        - Added get_in_dir, run_in_dir and get_or_set methods.
0.1     January 7, 2021
        Initial Version