Add per-branch build badges

Author: clareliguori

README.md

@@ -2,7 +2,10 @@
 
 This repository holds Dockerfiles of official AWS CodeBuild curated Docker images. Please refer to [the AWS CodeBuild User Guide](http://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref.html) for list of environments supported by AWS CodeBuild.
 
-![Build Status](https://codebuild.us-west-2.amazonaws.com/badges?uuid=eyJlbmNyeXB0ZWREYXRhIjoiSkJibVVQVEpvUms1cmw3YVlnU1hSdkpBQ0c5SFgyTkJXMFBFdEU2SWtySHREcUlUVlRhbW4zMEd3NlhsOWIzUWgvRkxhUWVSSTFPZGNNakNHRVNLalY0PSIsIml2UGFyYW1ldGVyU3BlYyI6IlV0QjBRZXRvS0F5dE5vbTciLCJtYXRlcmlhbFNldFNlcmlhbCI6MX0%3D&branch=master)
+Branch|Build
+---|---
+master|![Build Status](https://codebuild.us-west-2.amazonaws.com/badges?uuid=eyJlbmNyeXB0ZWREYXRhIjoiSkJibVVQVEpvUms1cmw3YVlnU1hSdkpBQ0c5SFgyTkJXMFBFdEU2SWtySHREcUlUVlRhbW4zMEd3NlhsOWIzUWgvRkxhUWVSSTFPZGNNakNHRVNLalY0PSIsIml2UGFyYW1ldGVyU3BlYyI6IlV0QjBRZXRvS0F5dE5vbTciLCJtYXRlcmlhbFNldFNlcmlhbCI6MX0%3D&branch=master)
+release|![Build Status](https://codebuild.us-west-2.amazonaws.com/badges?uuid=eyJlbmNyeXB0ZWREYXRhIjoiSkJibVVQVEpvUms1cmw3YVlnU1hSdkpBQ0c5SFgyTkJXMFBFdEU2SWtySHREcUlUVlRhbW4zMEd3NlhsOWIzUWgvRkxhUWVSSTFPZGNNakNHRVNLalY0PSIsIml2UGFyYW1ldGVyU3BlYyI6IlV0QjBRZXRvS0F5dE5vbTciLCJtYXRlcmlhbFNldFNlcmlhbCI6MX0%3D&branch=release)
 
 ### How to build Docker images
 
@@ -19,4 +22,4 @@ $ git clone https://github.com/aws/aws-codebuild-docker-images.git
 $ cd aws-codebuild-docker-images
 $ cd ubuntu/ruby/2.3.1
 $ docker build -t aws/codebuild/ruby-2.3.1 .
-```
+```