site updates
- game has master now. only master can change game settings, add/remove bots
- timer added. By default, it is 20 seconds plus 3 seconds per turn.
- updated the placement of exposed melds. The claimed tile is placed in rotated direction at the: left if it is from the left player, middle if from front, right if from right. Concealed kong is placed with two middle tiles concealed. Extended kong is placed with the last tile attached to the rotated tile. Thanks for Dr. B for his suggestions
- align discarded tiles area better
- fixed a bug in riichi rule: game stuck when there is a kong.