update README with travis badge

kidig · kidig · commit ca6504871fee · 2018-07-17T18:09:27.000+02:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# nbgrader-server
+# nbgrader-server [![Build Status](https://travis-ci.org/kidig/nbgrader-server.svg?branch=master)](https://travis-ci.org/kidig/nbgrader-server)
 Rest API server for nbgrader
 
 ## Install

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-# nbgrader-server`
	`1`	`+# nbgrader-server [![Build Status](https://travis-ci.org/kidig/nbgrader-server.svg?branch=master)](https://travis-ci.org/kidig/nbgrader-server)`
`2`	`2`	`Rest API server for nbgrader`
`3`	`3`
`4`	`4`	`## Install`