[Important Update & Informations] Adding Medals and change time limits

Hello, the update of the medals is out.

Update :

- Medals : Medals are now available in Nonograms. They are awarded when completing a puzzle according to the time taken. The Bronze medal represents the time limit (after it, the puzzle stops). The Silver medal represents 1/2 of the time limit. And the Gold medal represents 1/4 of the time limit (the most courageous can reach it). Medals are displayed in the detail popup in several forms: the different time types are displayed under Time To Beat and your best medal is displayed in the upper right corner. Your best medal is also displayed in the puzzle selection on each of them.

- Changing the time limits : After receiving feedback on the difficulty brought by the time limit, often considered too low. I have decided to increase them and they are no longer specific to size only. For example the Section 2-5 puzzle has more time to complete (which also impacts the medals) because it is more complex than the other 15x15 in the game. If you find a puzzle too hard or too simple, please let me know.

Every feedback is greatly appreciated and thank you for reading!