set user carts
added case for old cookie of cart in fetchCartFromCookies
added debug log
improved use cart
improved destroy and added add new method
deleted stuff which watched if a conflict in merging carts exists
added guest user functions
added default scope to cart
fixed bug and added get empty cart function
added own id for each cart
fixed links and used link to helper
refactored navigation partials
filtered active cart away
deleted cart conflict stuff (for merging carts)
fixed for autologin
added routes
added ajax views for new cart, switch cart and destroy cart
Merge branch 'develop' of github.com:DanielMSchmidt/vergleichsportal into develop