Merge pull request travis-ci#1736 from travis-ci/ci-profile_page

Add instructions to get API token from profile page on different docs pages

Author: iriberri

README.md

@@ -64,6 +64,27 @@ via POST), Puma is necessary.
 
 1. Open [localhost:9292](http://localhost:9292/) in your browser.
 
+### API V2 documentation
+
+API V2 (and 2.1) documentation is maintained in `slate/source`. To make changes to the API V2 docs:
+
+1. Install the requirements in `slate/Gemfile`:
+
+   ```
+   bundle install
+   ```
+
+2. Make your changes to `slate/source/index.md`.
+
+2. Build the API documentation:
+
+   ```
+   rake update_docs
+   ```
+
+4. Commit the changes and push to your branch.
+
+
 ## License
 
 Distributed under the [MIT license](https://opensource.org/licenses/MIT); the same as other Travis CI projects.