Version 0.1.5
- Add Text tool.
- Option panel can now move to left/right.
- You can now open a blank/ruled-line/grid page from the icon menu.

Version 0.1.4
- Add Undo/Redo functions.
- Add abort command to Eraser.

Version 0.1.3
- Fix touchscreen issue.

Version 0.1.2
- Add Line tool.
- Add abort command to Pen and Line. (ESC key)

Version 0.1.1
- Add contextual mouse pointer.

Version 0.1.0
- Initial release.