Merge branch 'develop' of https://github.com/cothientai/Verkeersland into develop
Merge branch 'develop' into feature/tai_dev
 - Added Selection panel scripts.
 - Puzzle has a duration before it scrambles.
 - Added OctoPuzzleGame scene.
 - Added screenshots possibilities in the octopusverkeerslandwindow.
 - Updated OctopusVerkeerslandWindow scripts so the buttons still works after a build or entering/exiting playmode.
 - Added exist property to the UnitySingleton class to check which manager to use.
 - Updated slotdrag and puzzlepiece scripts so it now set its transform to the last sibling to be rendered on top of everything else.
 - Added puzzlegame methods for the real game with scores.
 - Updated PuzzleTable to let the waiting of the scramble begin at the right time.
Merge branch 'feature/tai_dev' into develop