- add width and height in the statusbar
- rotation/symmetry http://stackoverflow.com/questions/34688514/after-rotate-draw-image-at-correct-position
- Open file
- Save file
- Tab system
- Undo/redo
- Settings (modal + json)
- Languages (json)
- Use arrows of the keyboard to move the image pixel per pixel
- Use Enter key to valide zoom /width / height input
- color of overlay in settings
- fix preview x2 open a file
- fix 00 value of width/height
- fix zoom cursor with arrow keys