update travis.yml and add badge

.travis.yml

@@ -8,6 +8,8 @@ go:
 
 sudo: false
 
+script: go build -v
+
 notifications:
   email:
     - u@gogs.io

README.md

@@ -1,4 +1,4 @@
-Gogs - Go Git Service [![wercker status](https://app.wercker.com/status/ad0bdb0bc450ac6f09bc56b9640a50aa/s/ "wercker status")](https://app.wercker.com/project/bykey/ad0bdb0bc450ac6f09bc56b9640a50aa) [![Build Status](https://travis-ci.org/gogits/gogs.svg?branch=master)](https://travis-ci.org/gogits/gogs)
+Gogs - Go Git Service [![Build Status](https://travis-ci.org/gogits/gogs.svg?branch=master)](https://travis-ci.org/gogits/gogs) [![Build Status](https://travis-ci.org/gogits/gogs.svg?branch=master)](https://travis-ci.org/gogits/gogs)
 =====================
 
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/gogits/gogs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)