Initial commit
Stack class & tests implemented.
Add 'epam/lab-0/' from commit 'ba3da5d1e21d2698358837585be46bf61e79328f'

git-subtree-dir: epam/lab-0
git-subtree-mainline: 7738977d48ef0a77e2c159ca06a4e2e6440d8f3e
git-subtree-split: ba3da5d1e21d2698358837585be46bf61e79328f