added spec for user sign in
added spec for user to view all their packing lists after signing in
updated spec to check for new list button on home page
updated spec to check for deadline date of list on homepage
added spec for user to add new list
updated routes to nest items under lists, added spec for adding a new item
refactored items controller, added view for all items
updated list create action to add list to current user lists
added js file for rendering existing items, using ajax request
fixed problem causing user id of items to be nil
added functionality to show all items when user clicks add item from existing
created ajax patch request to add item to list from items already created