Release v0.5.0b1

This is a beta release

Please ensure you are on v0.4.0b1 of the frontend card

This version updates the inventory integration to use SQLite, adds rudimentary support for bar codes, adds the ability for items to have multiple locations and categories, increment/decrement history, the ability to override the auto-add quantity with a persistent quantity that does not update as you increment or decrement an item, the ability to export/import inventory data, and some other small features and bug fixes.