introducing components: a way to reuse elements in different scenes. modified the Main view to fetch recipes and add them to the UI

abstract class BaseController, figuring out dependency injection into JavaFX controllers, added enum View.java to get correct Scene object (with correct constructor)

added BaseController that stores FXML files for all views, started bugfixing for equals methods, started working on recipe view fxml file

improved add-methods and knew method to check csv for other measurements than g and convert them to gram

Added parser to retrieve Ingredients from CSV files. includes tests. toString method for Ingredients. new NutritionTable constructor to create objects from List<Double>.

added more validation to Recipe constructor, fixing bugs in RecipeSearch, tests for RecipeSearch. now adding full recipes to the shopping list

implemented method to calculate NutritionTable for MealPlan, class MealPlan and renamed class App to TastyPages