Add missing path require

src/packages/package-generator/spec/package-generator-spec.coffee

@@ -1,5 +1,6 @@
 RootView = require 'root-view'
 fsUtils = require 'fs-utils'
+path = require 'path'
 
 describe 'Package Generator', ->
   [packageGenerator] = []

src/packages/tree-view/lib/tree-view.coffee

@@ -5,6 +5,7 @@ DirectoryView = require './directory-view'
 FileView = require './file-view'
 Dialog = require './dialog'
 fsUtils = require 'fs-utils'
+path = require 'path'
 shell = require 'shell'
 $ = require 'jquery'
 _ = require 'underscore'