Fix urls in different apps

[Ramin-RX7]

• Orders

  • order_list must be replaced by index. In fact these 2 are the same. so /orders/order_list must redirect back to the orders.index
  • this means the views also need to be renamed
  • order_details must be /orders/<int:id>.

• Foods

  • foods_list which must be the index should also be the same as menu. But this time, the the index of the foods app must redirect to the foods/menu/
  • food_details must have this url: foods/<int:id>
  • Category related views are ok as of now

[Ramin-RX7]

complete in #76