Inventory size now increases after 3 levels.
Fixed a typo (graveyard).
Implemented critical hits for the hero.

Reused a bit of Gabriel's code. (Just to mention)
Implemented AspectHelp.
Implemented luminosity and visibility.

Finished lightAttributes.

Changed some luminosities.

Improved the walking system.

Also added abbreviations for the directions.

Fixes #33
Fixes #32

Fixed a typing error.
Implemented luminosity validation.