Blending modes now included

Happy New Year! This update adds layer blend modes, a new toolbar for convenient access and a list of bug fixes.

Each layer now has a blend mode including multiply, linear burn, darken, lighten, color dodge and more.

A new toolbar has been added to the top of the canvas window giving you quick one click access to Undo, Rotate, Flip, Cut, Copy, Paste, Grid and Zoom.

Also included in the update is a list of bug fixes detailed in the update release notes