Merge pull request #231 from jonboulle/master

*: add .travis.yml and status badge to README

.travis.yml

+language: go
+matrix:
+  include:
+    - go: 1.4.3
+      install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get golang.org/x/tools/cmd/vet
+    - go: 1.5.2
+      install: true
+
+script:
+ - ./test
+
+notifications:
+  email: false
+
+sudo: false

README.md

 # dex
 
 
+[![Build Status](https://travis-ci.org/coreos/dex.png?branch=master)](https://travis-ci.org/coreos/dex)
 [![Docker Repository on Quay.io](https://quay.io/repository/coreos/dex/status?token=2e772caf-ea17-45d5-8455-8fcf39dae6e1 "Docker Repository on Quay.io")](https://quay.io/repository/coreos/dex)
 [![GoDoc](https://godoc.org/github.com/coreos/dex?status.svg)](https://godoc.org/github.com/coreos/dex)