message: Add readme messages about CI
  Based on discussion in
diff: @@ -111,7 +111,17 @@ fn main() {
  }
  ```
  -### Travis-ci and Coverage Sites
  +### Continuous Integration Services
  +
  +Tarpaulin aims to be easy to add to your CI workflow. With well tested support
  +for Travis-CI it also supports sending CI specific meta-data to coveralls.io for
  +Circle, Semaphore, Jenkins and Codeship (though only Jenkin's has been tested).
  +
  +You can also use Tarpaulin on Azure, check out
  +[crate-ci/azure-pipelines](https://github.com/crate-ci/azure-pipelines) for an
  +example config.
  +
  +#### Travis-ci and Coverage Sites
  The expected most common usecase is launching coverage via a CI service to
  upload to a site like codecov or coveralls. Given the built in support and
  