3 *Draw numbers centered horizontally on tile
4 a)Measure width of numbers
5 b)Get rid of approximated hard-coded values
7 *Examine group_is_run_one() and bug in group_is_run_two()
8 to determine optimum solution for checking for valid runs.
10 *Draw game->current_tile (tile being dragged) in front of all other tiles.
12 *Allow user to drag-n-drop tile on top/next to another tile in order
13 to group them together, side by side.
15 *Allow user to click-n-drag area to select multiple tiles to group together
17 b)highlight tiles selected