Bug fix! Highscore is now working.
Moved implementation to cpp file.
Removed unused file.
Moved implementations to cpp files.
Updated codeblocks project.
Removed unused code.
And updated codeblocks project file.
Added const identifier to some member functions.
Changes made in class GraphicBoard.
Bug fix. Drawing was incorrect sometimes.
This caused by incorrectly width and height.
Changed illogical code.
However, no changes was seen in the game by me.