Update to Hunger/Thirst messages

[Morgenes]

For a long time the amount of food and water you can contain, and many features of how that works was based on your character's size.  However, the messages that inform you when you were hungry were not.

We have updated this code to reflect the changes made to the rest of the code so that you might see a difference in how often or when you see the messages for hunger and thirst.  We used the current levels as the baseline for an 'average' human, so using 'help size' you can get an idea of how this might affect you.  If you're bigger, you're going to need to eat/drink more than a smaller character to stave off the hunger/thirst messages.