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

started moving dependencies to TastyPages class. Colour codes for categories are now saved in a string. recipe search by category works now, including UI updates

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