Add test script to run both unit and example tests

.travis.yml

@@ -1,4 +1,5 @@
 language: go
+script: "./test.sh"
 go:
     - 1.0
     - 1.1

test.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Run basic go unit tests
+go test -v ./...
+
+# Run example-based toml tests
+cd test_program && ./go-test.sh