add reload button
Merge branch 'master' of git-next.kde.org:kde/gcompris into sudoku
sudoku beginning
Merge branch 'master' of git-next.kde.org:kde/gcompris into sudoku

Conflicts:
	src/activities/activities.txt
continuation of sudoku
sudoku: regions and numbers
sudoku: images updated
sudoku: current item is in a box
Merge branch 'master' of git-next.kde.org:kde/gcompris into sudoku
sudoku: error state do not stay when restored
sudoku, reworked images

background comes from openclipart.
sudoku, improved item positions
sudoku, created a README for tracing images origin
sudoku, removed debug messages
sudoku, better item positioning