Fix instances of AppleCore's isFood not being used to determine whether or not items are foods
 * Fixes things like cake or IEdible implementors not having their stack size modified, being added to villager trades, or having their eating speed modified
Add config options: foodHungerDivider, foodSaturationDivider, and foodHungerToSaturationDivider
 * foodHungerDivider is simply a renamed modFoodValueDivider
 * Closes #54