add link to public demo
remove sass-cache from gitignore
fix untracked files
Revert "fix untracked files"

This reverts commit 40a7957a95555aa72ab554a0d42a89259ffe05c4.
Revert "Revert "fix untracked files""

This reverts commit d585fc14140f6ded38f73c72465f0268402b944d.
position the link a little lower