New features
* Add screen.drawTexturedQuad() and screen.drawTexturedTriangle()
* to draw textured primitives.

Improvements
* Change the logo of the binaries. It is now really cute
* Change the transparency system. There are now the functions screen.getLayer() to get the current layer and screen.getAlphaLevel() to get the current blending coefficient.
* For screen.setAlpha(), the layer argument is now always optionnal.
* Improve the System.listDirectory() function. It now sorts files and directories alphabetically, and give the size of the files.

Bug fixes
* Add some functions to ease handling canvas objects (Canvas.setObjOnTop() and Canvas.removeObj()).
* Fix getting a BSoD when pressing Start at startup.
* Fix some Image transformations not being permanent with Canvas.
* Transparency levels are now between 0 and 99 (as 100 resets the transparency system).
* Fix Canvas.getAttr() which now only requires two arguments.
* Fix Canvas.removeObj() to now delete the right objet.