Kröl version 0.03 ! Added poisons, torches and enhanced lighting system

Gameplay changes : 

•  lighting of rooms according to the player's angle of vision 
•  added a characteristic for the player's vision (increased by 1 by the "Mental" attribute)
•  added 'Torch' cards to increase the player's vision 
•  added 'Scroll' cards allowing to cast spells (Lightning, Teleportation, Door Opening, Trap Detection) 
•  some NPCs (scorpions...) can poison the player, decreasing his vision or speed 
•  added "Antidote" cards to stop the effect of the poison 
• added level 5 (new environment)

Interface changes: 

• added introductory text at the beginning of each level 
•  added level title in the interface
•  added an @ to mark the player's position on the map
• inventory slots can hold up to 4 scrolls 
•  added modifiers (effect of potions, poisons...) in the character sheet

 Graphic changes :

• integration of a fade to black between rooms 
• added transition backgrounds between levels and at player death + fade effect at player death 
• reduced wall opacity when an NPC is placed behind it (if it is supposed to be visible) 
• added an option to adjust the brightness