move old files to a separate directory

.travis.yml

@@ -1,19 +0,0 @@
-language: rust
-
-branches:
-  only:
-  - master
-
-cache:
-  cargo: true
-
-script:
-  - cargo run --bin generate_readme
-  - git config user.name "Carol (Nichols || Goulding)"
-  - git config user.email "carol.nichols@gmail.com"
-  - git commit -am "Regenerate README" && git remote add upstream "https://$GH_TOKEN@github.com/carols10cents/rustlings.git" && git push -q upstream HEAD:master > /dev/null 2>&1 || true
-
-notifications:
-  email:
-    on_success: never
-