Fixed bound adress and added a command example.
Added support for multiple animations.
Quick description of the main features of the game
Refactored camera
The attribute "priority" is renamed "z".
Added a method get_center() in Image class.
Changed method move() to accept a vector as an optional argument. This method can now be called to perform an immediate translation.
Added a tree and a portal for testing purpose.
Added an idle animation to the character (pixelart not finished).
As character is now inside camera, I changed the world class so that the repulsion is applyed to not only the object, but also the obstacle.
Changed the mirror() method to accept an optional argument : a rectangle that permits to mirror frame by frame a tiled image.
See the comment for usage.