Tortoise Song now only dispels songs and rolls, food no longer removed when entering battlefield or level sync

tortoise song now only dispels status effects flagged with EFFECTFLAG_SONG or EFFECTFLAG_ROLL - this is retail behavior

created new EFFECTFLAG_SONG and ROLL in status.lua and status_effect.h

removed EFFECTFLAG_DEATH from the 'food' status effect and added EFFECTFLAG_FOOD to the flags of deleted status effects on player death in the ActionDeath() function 

having the 'food' effect flagged with the 'DEATH' flag was causing food effects to be removed upon level sync and entering a battlefield (non-retail behavior)