deleted old balls
Squashed 'balls/' content from commit 6b8eecf

git-subtree-dir: balls
git-subtree-split: 6b8eecf994ee6d347bede056ff85f4b252f95d42
Merge commit 'a6b070b6c1fe3b1bd855900a39057f03d5a2d9bf' as 'balls'