Add CircleCI build and badge (open-telemetry#61)

* Test CircleCI build

* Test CircleCI build

* Add CircleCI Badge

README.md

@@ -1,9 +1,6 @@
 # OpenTelemetry - distributed tracing and stats collection framework
-
-Node Channel: [![Gitter chat][node-gitter-image]][node-gitter-url]
-
-Community Channel: [![Gitter chat][main-gitter-image]][main-gitter-url]
-
+[![Gitter chat][node-gitter-image]][node-gitter-url]
+[![CircleCI][circleci-image]][circleci-url]
 
 We'd love your help!. Use tags [up-for-grabs][up-for-grabs-issues] and
 [good first issue][good-first-issues] to get started with the project. Follow
@@ -12,8 +9,8 @@ We'd love your help!. Use tags [up-for-grabs][up-for-grabs-issues] and
 ## Contributing
 We have a weekly SIG meeting! See the [community page](https://github.com/open-telemetry/community#nodejs-sdk) for meeting details and notes.
 
-[main-gitter-image]: https://badges.gitter.im/open-telemetry/community.svg
-[main-gitter-url]: https://gitter.im/open-telemetry/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+[circleci-image]: https://circleci.com/gh/open-telemetry/opentelemetry-js.svg?style=svg
+[circleci-url]: https://circleci.com/gh/open-telemetry/opentelemetry-js
 [node-gitter-image]: https://badges.gitter.im/open-telemetry/opentelemetry-js.svg
 [node-gitter-url]: https://gitter.im/open-telemetry/opentelemetry-node?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
 [up-for-grabs-issues]: https://github.com/open-telemetry/OpenTelemetry-js/issues?q=is%3Aissue+is%3Aopen+label%3Aup-for-grabs

packages/opentelemetry-core/README.md

@@ -1,4 +1,3 @@
-OpenTelemetry Core
-======================================================
+# OpenTelemetry Core
 
 TODO

packages/opentelemetry-types/README.md

@@ -1,4 +1,4 @@
-# OpenTelemetry types
+# OpenTelemetry Types
 
 This package provides TypeScript interfaces and enums for the OpenTelemetry core trace and metrics model.