Instacali windows buttons

Goofed around with the x - + buttons today. Just a draft, I'm not quite happy with the minimize button yet. Also, the headline of "Today" doesn't stand out quite strongly enough. And the distance between each task line seems too condensed -- might have to extend it much more for readability. But I'm happy with the paper texture and paper stack overlays.

PS: In case you're wondering about the Instacali logo, it's actually a bullet point in shape of a boomerang. :)