moved HeaderController into new package. Now displaying NutritionTable in MealPlan. -> going to turn it into a component to reuse it in RecipeView. Introduced parallel search to RecipeSearch.

rounded category boxes, redesigned add recipe buttons in mealplan, display categories in recipeview, improved GUI

refactoring RecipeSearch, slight visual changes, now selecting ingredients in recipe creator and validating number inputs

Categories, recipes and ingredients now saved in hashmap together with their associated code and a whole bunch of refactoring to go along with it. TypeAdapters for Recipes, NutritionTables and Categories. Saving and retrieving Recipe, NutritionTable and Category to / from JSON works (see tests).

simplified NutritionTable equals() method. created component classes for RecipeTile and CategoryCheckBox