adding missing copyright headers (and excluding third party lib)

Gruntfile.js

@@ -10,7 +10,8 @@ module.exports = function (grunt) {
     copyright: {
       files: [
         "**/*.js",
-        "!**/node_modules/**"
+        "!node_modules/**",
+        "!client/emscrypt.js"
       ],
       options: {
         pattern: "This Source Code Form is subject to the terms of the Mozilla Public"

test/run/api_error_tests.js

@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 var test = require('tap').test
 var TestServer = require('../test_server')
 var crypto = require('crypto')

test/run/signer_tests.js

@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 var fs = require('fs')
 var path = require('path')
 var test = require('tap').test

test/test_server.js

@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 var cp = require('child_process')
 var P = require('p-promise')
 var request = require('request')