Rusting 0.1.7

Adds draw order for brushes, shapes and fills, an eraser that works on fills, an eyedropper, and the Rusting logo as the app icon.

New

• Draw order: brush, rectangle, ellipse and paint bucket can draw behind, normally, or in front of everything else in the frame. Drawing tools
• Eraser on fills: whole mode removes fills it touches; partial mode cuts holes in fills or splits them, keeping their colour and gradient. Drawing tools
• Eyedropper: pick a colour from the canvas. Drawing tools

Improved

• App icon: the Rusting logo is now the window, taskbar and Dock icon, and appears on the start menu. Start menu

What's Changed

• Use the website logo as the app icon by @HalfdanIsaksen in #17
• docs: refresh README by @HalfdanIsaksen in #18
• bucket tool update by @HalfdanIsaksen in #19
• Drawing tools: draw order, eraser on fills, eyedropper by @HalfdanIsaksen in #20

Full Changelog: v0.1.6...v0.1.7