* lsdb.el (lsdb-entry-type-alist): Add AKA.

* lsdb.el (lsdb-entry-type-alist): Add AKA.
(lsdb-reverse-hash-table): New function.
(lsdb-hash-tables-are-dirty): Rename from lsdb-hash-table-is-dirty.
(lsdb-secondary-hash-table-start-format): New constant.
(lsdb-secondary-hash-table-start): New macro.
(lsdb-read): Splitted from lsdb-load-file.
(lsdb-load-hash-tables): New function.
(lsdb-insert-hash-table): New function.
(lsdb-save-hash-tables): Rename from lsdb-save-file.
(lsdb-maybe-build-reverse-hash-table): New function.
(lsdb-maybe-load-hash-tables): Rename from lsdb-maybe-load-file.
(lsdb-update-record): Look for the existing record from the reverse hash table.