shapes now have a preview while drawing, fixed the bad aliasing on shapes with thickness of 1, added opacity and shortcuts to change quality
added __len__() to Map & Group
added ellipse drawing and filled shapes
renamed [Ee]llipsis to [Ee]llipse
added curve drawing, but preview is buggy
added curves and working preview
selection partially working
added custom graphics view
events are now handled by the scene
reprise aprs longtemps
.
debut refactorisation
test pixmap
antialiasing