♦︎ Add as many scoreViews as desired

- Added NSMutableArray to store scoreViews
- Added button to navigation bar
- added target-action to button
- added function to call addScoreView with index
- set default of two scoreViews to start
- set scrollView.content size to be same size as total number of scoreViews

Signed-off-by: Taylor Mott <trm36@humboldt.edu>