required_players_secret added, which is the number of players needed for a game mode to start when that mode has been chosen at random.

required_players for most modes reduced to the number of antagonists + 1, as the variable is only used when the game mode is explicitly voted for.
Merge pull request #2186 from RavingManiac/master

Changes to the minimum number of players needed for a game mode to start
Bugfix: Fix metabolism rates for foods, drinks and sleep toxins.
Merge pull request #2192 from CIB/BEF-premerge

Metabolism fix
Merge pull request #2 from Baystation12/master

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