README: Add more specification on the first message. (#55)
README: Add more specification on the first message. (#55)

* README: Add more specification on the first message.

* Update wording.

* Fix typos

open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib,census-instrumentation/opencensus-service,open-telemetry/opentelemetry-collector,census-instrumentation/opencensus-service