Usage :
* Double click on the image to add a new bubble.
* Double click on one of 8 square dots of the red outline to turn the bubble without any style into a 'proper'
speech balloon
* Keep double clicking on the bubble tail to change the style ('speak', 'think', 'scream','arrow')
* Click on the bubble inside the selection frame to type some text
* Drag and drop to move/resize the bubble and to move the tail ending
* Click the 's' button to display the settings box and format the bubble
* If you want to remove a bubble, select it and press 'Delete'.
