[xcodeproj] Update to work with prebuilt binaries.

Gemfile.lock

@@ -7,7 +7,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: 4769d4a3424311c6f865f8c27d6065f71d001dbe
+  revision: 8b1ace0d2d84c2fd4869c0f99de633613840d352
   branch: master
   specs:
     cocoapods-core (0.26.2)
@@ -17,7 +17,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Xcodeproj.git
-  revision: b45e203f4aa68653f4bf7febc4b074b2016e2acd
+  revision: 3187d3afaa27d20e41d6cee7667127be9c7eb60d
   branch: master
   specs:
     xcodeproj (0.13.1)

cocoapods.gemspec

@@ -30,7 +30,7 @@ s.files = Dir["lib/**/*.rb"] + %w{ bin/pod bin/sandbox-pod README.md LICENSE CHA
   s.add_runtime_dependency 'cocoapods-core',       "= #{Pod::VERSION}"
   s.add_runtime_dependency 'claide',               '~> 0.3.2'
   s.add_runtime_dependency 'cocoapods-downloader', '~> 0.2.0'
-s.add_runtime_dependency 'xcodeproj',            '~> 0.13.1'
+  s.add_runtime_dependency 'xcodeproj',            '~> 0.13.1'
 
   s.add_runtime_dependency 'colored',       '~> 1.2'
   s.add_runtime_dependency 'escape',        '~> 0.0.4'

lib/cocoapods/generator/acknowledgements/plist.rb

@@ -2,13 +2,12 @@ module Pod
   module Generator
 
     class Plist < Acknowledgements
-      require "xcodeproj/xcodeproj_ext"
-
       def self.path_from_basepath(path)
         Pathname.new(path.dirname + "#{path.basename.to_s}.plist")
       end
 
       def save_as(path)
+        require 'xcodeproj/ext'
         Xcodeproj.write_plist(plist, path)
       end