Merge pull request #4 from rootfs/travis

add travis

.travis

@@ -0,0 +1,14 @@
+language: go
+branches:
+  only:
+    - master
+
+go: 1.9.x
+
+before_script:
+  - GO_FILES=$(find . -iname '*.go' -type f | grep -v /vendor/)
+  - go get github.com/golang/lint/golint
+
+script:
+  - test -z $(gofmt -s -l $GO_FILES)
+  - go vet -v $(go list ./... | grep -v /vendor/)