Encumbrance changes! Now XP improves your carrying capacity!

Simple first-pass rule implemented today... I plan on tweaking this (as everything) as more feedback rolls in.  As it stands, 1 level of XP = 1 additional unit you can carry (e.g. 1 stone, or 2 wood).

This is meant to provide disincentive to dying in general, especially suiciding to restore hunger.  Now keeping your XP is more important, as it alleviates one of the major constraints (carry capacity).  I am planning on adding more things that XP adjusts in the future, so stay tuned!