Add build to status to readme

README.md

@@ -1,5 +1,7 @@
 ## C# for Visual Studio Code (powered by OmniSharp)
 
+Master: [![Build Status](https://travis-ci.org/omnisharp/omnisharp-vscode.svg?branch=master)](https://travis-ci.org/omnisharp/omnisharp-vscode)
+
 Don't install this extension unless you want to try an early version. 
 
 This is a preview of C# support in Visual Studio code. It is designed to work well with the upcoming [.NET Core 1.0](http://dotnet.github.io/).