Allow leaders to update the game state

[jbriones1]

Description

To reduce the latency between a game state change, leaders should be able update the game state.

Features

• Allow a leader to be assigned roles.
• A leader assigned to hold Antipac can update who Antipac is.
• A leader assigned to hold the FROSH flag can change ghosts to edible.
• Leaders whose access has been revoked should automatically regain their controls if promoted again
• A leader assigned to Pacman can indicate who caught Pacman.