Use strict mode in all backend files

add ‘use strict’ in all backend file

lib/auth.js

@@ -1,3 +1,4 @@
+'use strict'
 // auth
 // external modules
 var passport = require('passport')

lib/config.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var fs = require('fs')
 var path = require('path')

lib/history.js

@@ -1,3 +1,4 @@
+'use strict'
 // history
 // external modules
 

lib/letter-avatars.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var randomcolor = require('randomcolor')
 

lib/logger.js

@@ -1,3 +1,4 @@
+'use strict'
 var winston = require('winston')
 winston.emitErrs = true
 

lib/migrations/20160515114000-user-add-tokens.js

@@ -1,3 +1,4 @@
+'use strict'
 module.exports = {
   up: function (queryInterface, Sequelize) {
     queryInterface.addColumn('Users', 'accessToken', Sequelize.STRING)

lib/migrations/20160607060246-support-revision.js

@@ -1,3 +1,4 @@
+'use strict'
 module.exports = {
   up: function (queryInterface, Sequelize) {
     queryInterface.addColumn('Notes', 'savedAt', Sequelize.DATE)

lib/migrations/20160703062241-support-authorship.js

@@ -1,3 +1,4 @@
+'use strict'
 module.exports = {
   up: function (queryInterface, Sequelize) {
     queryInterface.addColumn('Notes', 'authorship', Sequelize.TEXT)

lib/migrations/20161009040430-support-delete-note.js

@@ -1,3 +1,4 @@
+'use strict'
 module.exports = {
   up: function (queryInterface, Sequelize) {
     queryInterface.addColumn('Notes', 'deletedAt', Sequelize.DATE)

lib/migrations/20161201050312-support-email-signin.js

@@ -1,3 +1,4 @@
+'use strict'
 module.exports = {
   up: function (queryInterface, Sequelize) {
     queryInterface.addColumn('Users', 'email', Sequelize.TEXT)

lib/models/author.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var Sequelize = require('sequelize')
 

lib/models/index.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var fs = require('fs')
 var path = require('path')

lib/models/note.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var fs = require('fs')
 var path = require('path')

lib/models/revision.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var Sequelize = require('sequelize')
 var async = require('async')

lib/models/temp.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var shortId = require('shortid')
 

lib/models/user.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var md5 = require('blueimp-md5')
 var Sequelize = require('sequelize')

lib/realtime.js

@@ -1,3 +1,4 @@
+'use strict'
 // realtime
 // external modules
 var cookie = require('cookie')

lib/response.js

@@ -1,3 +1,4 @@
+'use strict'
 // response
 // external modules
 var fs = require('fs')

lib/workers/dmpWorker.js

@@ -1,3 +1,4 @@
+'use strict'
 // external modules
 var DiffMatchPatch = require('diff-match-patch')
 var dmp = new DiffMatchPatch()