[BUG] Logging out resets user's shopping cart #82
Description
Introduced in #81
Upon logging out and logging back in, the user will find their shopping cart empty.
Occurs because of breaking change introduced in /frontend/reducers/cartReducers.js, CART_RESET resets the current shopping cart to its initial (empty) state upon logout, which is then saved to localStorage.
Because cart storage is currently handled via localStorage, one of these components will need to change.