Add .travis.yml for Travis CI integration.

.travis.yml

@@ -0,0 +1,15 @@
+nguage: go
+go:
+   - 1.0
+   - 1.1
+   - 1.2
+   - 1.3
+   - 1.4
+   - 1.5
+   - tip
+script:
+   - go test -v
+matrix:
+  allow_failures:
+      - go: 1.0
+      - go: 1.1