build: add travis configuration

.travis.yml

@@ -0,0 +1,10 @@
+language: go
+go:
+  - 1.3
+  - 1.2
+
+install:
+ - go get code.google.com/p/go.tools/cmd/cover
+
+script:
+ - ./test

README.md

@@ -1,5 +1,7 @@
 # etcd
 
+[![Build Status](https://travis-ci.org/coreos/etcd.png?branch=master)](https://travis-ci.org/coreos/etcd)
+
 ### WARNING ###
 
 The current `master` branch of etcd is under heavy development in anticipation of the forthcoming 0.5.0 release.