Support for side/action/... dishes

[COM8]

Original: srehwald#14

Currently the parser shows only dishes of the day.
It would be great if it would show all types of dishes.

They could get represented like:

 "dishes": [
    {
      "name": "Bio-Tortelloni all'arrabiata",
      "type": "Tagesgericht",
      "price": 1.9
    },
    {
      "name": "Nudeln",
      "type": "Beilagen",
      "price": 0.6
    },
    {
      "name": "Reis",
      "type": "Beilagen",
      "price": 1
    },
    {
      "name": "Bio-Spaghetti bolognese",
      "type": "Aktion",
      "price": 3
    }
  ]