[WIP] Add event handler with different game events

[anthonyec]

Summary

tbs (to be summarised)

Todo

• Figure out how to store reference to the event handler function in C++
• Decide on what events are needed
• Decide on if event info should be passed or should a reference to Umpire class be passed like AceButton
• Add game end event
• Add game reset event
• Add game undo event
• Add game deuce event