Implement a better point system

[sephirothx]

v2

• Each puzzle starts at 1200 points
• A puzzle's points are divided among all the players who solved it with the fomula: 120 + 1080 / solves
• Each time a puzzle is solved, the score is updated for every player who solved that puzzle
• A puzzle's score cannot go below 120

v1

• Each puzzle starts at 1080 points
• A puzzle's points are divided equally among all the players who solved it
• Each time a puzzle is solved, the score is updated for every player who solved that puzzle
• A puzzle's score cannot go below 1

v0

• Each puzzle starts at 1024 points
• Each time a puzzle is solved, its score is halved and the score is updated for every player who solved the puzzle (everyone gets the same amount of points from having solved the same puzzle)
• A puzzle's score cannot go below 1