Add configuration for Travis CI.

Fixes #77.

Signed-off-by: David Symonds <dsymonds@golang.org>

.travis.yml

diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..e33be0b
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,7 @@
+language: go
+
+install:
+  - go get -t -v ./...
+
+script:
+  - go test -v ./...