Started to implement luminosity, visibility and lightPermittivity.
Implemented critical hits for the hero.

Reused a bit of Gabriel's code. (Just to mention)
Implemented AspectHelp.
Merge branch 'master' of https://github.com/mafagafogigante/dungeon into luminosityAttributes
Finished lightAttributes.
Changed some luminosities.
Improved the walking system.

Also added abbreviations for the directions.

Fixes #33
Fixes #32
Merge branch 'master' of https://github.com/mafagafogigante/dungeon into luminosityAttributes
Fixed a typing error.
Implemented luminosity validation.
Wrote a better printAge method.

Also added 2 TODOs.