added active user function
added guest user functions
made search results work again
deleted email null => false, because we haveto allow users without an email
changed new to create to have a db entry
fetching active users and carts
wsp
added specs for not logged in user
deleted unused function
fixed test bug
renamed create action of user sessions
added todo
handled case with logging in a user in each variety of cart usage
added function to add a cart to a user
added a scope to get the latest updated and a todo
added function to check if a cart is empty
added activeCart and addCart functions to user
added ajax request to rely on users choice and change the active cart according to his needs
fixed todo
updated todos