[rstats] Add refinement fields for events

[pierrelafortune]

Current:
Generic field creation, only name edits allowed

To-add:
Each event can have it's own custom fields all automated functionally

Example:
berryDeposit event has three fields of data x_pos, y_pos, player 145,91,3

Notes:
New function should include these 3 and add map, team. A future iteration may even have game state data berries placed/berries to-go, as speed.