Adding 'Highest Wins' mode

[deputyteddy]

Hey guys. I have implemented on my client a 'highest wins' mode where you can enter an amount of gold in the textfield in casino mode and it standard is roll to 100. I also added a check for the chat message at the end of the game to wirte 'Everybody owes [Player X] [Amount Y] gold.'

Would love to contribute to this addon, since our guild picked up gambling themselves.

[manistal]

Hey @deputyteddy - that sounds great! Always taking pull requests, now would be a great time to PR, just finished cleaning up all the branches and libs