Add script to verify all boilerplate; add line to make travis run it.

.travis.yml

@@ -8,6 +8,7 @@ install:
   - go get code.google.com/p/go.tools/cmd/cover
   - go get github.com/coreos/etcd
   - bad=$(gofmt -s -l pkg/ cmd/) bash -x -c '[[ -z "$bad" ]]'
+  - ./hack/verify-boilerplate.sh
   - ./hack/build-go.sh
 
 script:

hack/verify-boilerplate.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+REPO_ROOT="$(realpath "$(dirname $0)/..")"
+
+result=0
+
+dirs=("pkg" "cmd")
+
+for dir in ${dirs}; do
+  for file in $(grep -r -l "" "${REPO_ROOT}/${dir}/" | grep "[.]go"); do
+    if [[ "$(${REPO_ROOT}/hooks/boilerplate.sh "${file}")" -eq "0" ]]; then
+      echo "Boilerplate header is wrong for: ${file}"
+      result=1
+    fi
+  done
+done
+
+exit ${result}