MainWindow basique
Add image widget
Fix connect leftImage
Add includes + qdebug
image loading ok
Add table widget.
Add scaling and position tooltip.
Handle mouse clicks.
Remove useless "scale" member.
Handle table update from left image clicks.
No tooltip outside image zone.
Selection, update, deletion.
Add export dialog.
Add units to labels.
Add README.
Disable click outside image.
Merge branch 'GUI'