fix build

src/app.js

@@ -12,7 +12,7 @@ var OffsetToLineColumnConverter = require('./lib/offsetToLineColumnConverter')
 
 var QueryParams = require('./lib/query-params')
 var GistHandler = require('./lib/gist-handler')
-var helpers = require('./lib/helper')
+var helper = require('./lib/helper')
 var Storage = require('./storage')
 var Browserfiles = require('./app/files/browser-files')
 var chromeCloudStorageSync = require('./app/files/chromeCloudStorageSync')
@@ -219,7 +219,7 @@ function run () {
   // Add files received from remote instance (i.e. another browser-solidity)
   function loadFiles (filesSet) {
     for (var f in filesSet) {
-      filesProviders['browser'].set(helpers.createNonClashingName(f, filesProviders['browser']), filesSet[f].content)
+      filesProviders['browser'].set(helper.createNonClashingName(f, filesProviders['browser']), filesSet[f].content)
     }
     fileManager.switchFile()
   }

src/app/panels/file-panel.js

@@ -10,7 +10,7 @@ var modalDialog = require('../ui/modaldialog')
 var modalDialogCustom = require('../ui/modal-dialog-custom')
 var QueryParams = require('../../lib/query-params')
 var queryParams = new QueryParams()
-var helpers = require('../../lib/helper')
+var helper = require('../../lib/helper')
 
 var remix = require('ethereum-remix')
 var styleGuide = remix.ui.styleGuide
@@ -246,7 +246,7 @@ function filepanel (appAPI, filesProvider) {
   }
 
   function createNewFile () {
-    var newName = filesProvider['browser'].type + '/' + helpers.createNonClashingName('Untitled.sol', filesProvider['browser'])
+    var newName = filesProvider['browser'].type + '/' + helper.createNonClashingName('Untitled.sol', filesProvider['browser'])
     if (!filesProvider['browser'].set(newName, '')) {
       modalDialogCustom.alert('Failed to create file ' + newName)
     } else {