Vegan-friendliness has come a long way over the last decade. I still remember when it was practically a requirement to dedicate half of your suitcase to food. Conversations with airport security always went something like, “Oh, you must be vegan or gluten-free or something,” as they rifled through 10 bags of ready-made meals. Today, much has changed. I generally grab just a few things before heading to the airport, just…