Add better wording to the README.
Add better wording to the README.

cloudfoundry-incubator/cf_canaries,cloudfoundry-incubator/cf_canaries,cloudfoundry-incubator/cf_canaries,pivotal-cf-experimental/cf_canaries,pivotal-cf-experimental/cf_canaries,pivotal-cf-experimental/cf_canaries,cloudfoundry-incubator/cf_canaries,pivotal-cf-experimental/cf_canaries