Add initial Travis CI configuration!

.travis.yml

@@ -0,0 +1,15 @@
+language: go
+go:
+  - 1.4.1
+  - 1.3.3
+
+# let us have pretty, fast Docker-based Travis workers!
+sudo: false
+
+# we don't need "go get" here <3
+install: true
+
+script:
+  - go test -v archive/tar/...
+    # testing archive/tar directly thanks to:
+    #   can't load package: /home/travis/gopath/src/github.com/vbatts/tar-split/main.go:11:2: local import "./archive/tar" in non-local package