travis: add page (#4744)

pages/common/travis.md

@@ -0,0 +1,24 @@
+# travis
+
+> Command line client to interface with Travis CI.
+> More information: <https://github.com/travis-ci/travis.rb>.
+
+- Display the client version:
+
+`travis version`
+
+- Authenticate the CLI client against the server, using an authentication token:
+
+`travis login`
+
+- List repositories the user has permissions on:
+
+`travis repos`
+
+- Encrypt values in `.travis.yml`:
+
+`travis encrypt {{token}}`
+
+- Generate a `.travis.yml` file and enable the project:
+
+`travis init`