Movement and Inventory Update

Updates :
- Movement System,
- Inventory System,
- Item drop on room cleared,
- Sorcerer VFX

Movement System :
I changed the movement and attack system to permit more gameplay opportunities like adding multiple attacks, special attack consuming all your attacks etc..
For now i make a simple system based on 2 state, Movement and Attack.
I'm still thinking about mixing both to permit Movement and Attack in the same state to permit for example to attack one time and run away.

Inventory System :
For now there is no indication before equipping the item of what he did, I'm still working on it, but it's not the priority.
You can equip what ever you want but be caution that some weapon have more range, more attacks or more damage.
As for weapon, shield and helmet have it's own stats like armor, movement added / removed.

Item drop :
In relation with the inventory system, on clearing a room you will be able to get a weapon / shield / helmet.
You have 50% to get an item.

Sorcerer VFX :
Modification of the sprite before the sorcerer launch his spell for only one reason, it's cool !