Added Score Notifications feature

This feature allows users to get live score updates via the xbmc notifications object. Every 60 seconds the thread will check the scoreboard for any changes, if a change has occurred the goal(s) are highlighted and displayed on the bottom right of the screen for 5 seconds. It also checks if the user is watching a live game and doesn't display updates for that game because there is the possibility that the notification would get ahead of the stream.