As a user I want to keep a list of my favorite dishes and location

# Tasks

- [x] Add a new table for favorite dishes
- [x] Add a model for new table
- [x] Add methods to Dishes model to get a list of favorites
- [x] Add a new controller for Favorites
- [x] Change Dishes view to integrate stars for favoriting
- [x] Make clicking stars do work for dishes
- [x] Add a view for listing favorite dishes
- [x] Hide favoriting from not logged in stalkers
- [x] Prettify favorite views (dishes)
- [x] Add an icon "currently on offer" to favorite dish view
- [x] Add a function to calculate the distance between a user and a dish
- [x] Add a border around tabs available in My Favorites

- [x] Add new table for favorite locations
- [x] Add a model for new table
- [x] Add methods to Locations model to get a list of favorites
- [x] Change Restaurant view to integrate stars for favoriting
- [x] Make clicking stars do work for locations
- [x] Add a view for listing favorite locations
- [x] Hide favoriting from not logged in stalkers
- [x] Prettify favorite views (locations)

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