Add travis ci support

.travis.yml

diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..a578cbf
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,9 @@
+language: go
+go:
+  - 1.2
+  - 1.3
+  - release
+  - tip
+
+script:
+  - go test -v ./...

README.md

diff --git a/README.md b/README.md
index dac30be..d7b1145 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-viper
+viper [![Build Status](https://travis-ci.org/spf13/viper.svg)](https://travis-ci.org/spf13/viper)
 =====
 
 Go configuration with fangs