Explicit the license (initial version by BC, Qt by JJ).
Limits to 80 columns
The border width lessens when the ball advances.
Added a script to create new activities.

Tu use it, go in the src/activities directory and run:
./createit.sh myactivity

It copies the files in the template directory and rename them
with the name of the requested activity name. The activity list
and the GCompris.pro are also updated so you can run the activity
immediately.
Add image for ball, add a rotation animation for the ball.
When the screen size changes, the ball go to its good position
(except if you change during the animation but it won't happen :)).
Fix error in comment
Merge https://github.com/bdoin/GCompris-qt
Add sounds, differenciation between mobile and desktop.