Added a "Check if recipe already in favourites" function to the User Class. Removed Second favourite button from Recipe Forum. Made sure user can only add a recipe to favourites only once. Changed Utility to include a function to easily make non-error toasts.
Added a color constant to Utility. Added a pair of functions for intents going into Search Activity to show notifications. Modified Main Menu to display number of notifications if any.
User can now view notifications. Notifications are displayed on the main menu under the welcome message. The welcome message becomes a button when there are notifications, otherwise is a plain text view.
Merge branches 'gui' and 'comm' of ssh://github.com/tina-wang365/UCRCS180Project into comm