Add destroy and extra convenience features to AllegroFlare::Bin

AllegroFlare/Bin needs:
  - `destroy("name")`
  - `destroy(T of_value)`
  - `destroy(std::vector<std::string> names)`
  - `destroy(std::vector<T> of_values)`
  - `preload(std::vector<std::string> filenames_also_as_identifiers)`
  - `preload(std::vector<std::pair<std::string, std::string>> list_of_identifiers_and_filenames)`