Initial commit contains three solutions for Ant Sequence problem.
1. iterator, 2. thread, 3. lazy sequence
Add 'Ant/' from commit '52dcdf8aeef3612848deede5dbc1d048d8ed7839'

git-subtree-dir: Ant
git-subtree-mainline: 1097f6c860dfcb21f1e23a144d11cd7ff1bb3d2b
git-subtree-split: 52dcdf8aeef3612848deede5dbc1d048d8ed7839
Delete .class files