Sync devtools

Gemfile.devtools

@@ -2,7 +2,7 @@
 
 group :development do
   gem 'rake',  '~> 10.1.0'
-  gem 'rspec', '~> 2.14.1'
+  gem 'rspec', '~> 2.13.0'
   gem 'yard',  '~> 0.8.6.2'
 end
 
@@ -15,34 +15,37 @@ group :guard do
   gem 'guard-bundler', '~> 1.0.0'
   gem 'guard-rspec',   '~> 3.0.2'
   gem 'guard-rubocop', '~> 0.2.0'
-  gem 'guard-mutant',  '~> 0.0.1'
 
   # file system change event handling
   gem 'listen',     '~> 1.2.2'
-  gem 'rb-fchange', '~> 0.0.6', require: false
-  gem 'rb-fsevent', '~> 0.9.3', require: false
-  gem 'rb-inotify', '~> 0.9.0', require: false
+  gem 'rb-fchange', '~> 0.0.6', :require => false
+  gem 'rb-fsevent', '~> 0.9.3', :require => false
+  gem 'rb-inotify', '~> 0.9.0', :require => false
 
   # notification handling
-  gem 'libnotify',               '~> 0.8.0', require: false
-  gem 'rb-notifu',               '~> 0.0.4', require: false
-  gem 'terminal-notifier-guard', '~> 1.5.3', require: false
+  gem 'libnotify',               '~> 0.8.0', :require => false
+  gem 'rb-notifu',               '~> 0.0.4', :require => false
+  gem 'terminal-notifier-guard', '~> 1.5.3', :require => false
 end
 
 group :metrics do
   gem 'coveralls', '~> 0.6.7'
-  gem 'flay',      '~> 2.3.1'
-  gem 'flog',      '~> 4.1.1'
-  gem 'reek',      '~> 1.3.1',  git: 'https://github.com/troessner/reek.git'
-  gem 'rubocop',   '~> 0.10.0', git: 'https://github.com/bbatsov/rubocop.git'
+  gem 'flay',      '~> 2.3.0'
+  gem 'flog',      '~> 4.1.0'
+  gem 'reek',      '~> 1.3.1', :git => 'https://github.com/troessner/reek.git'
+  gem 'rubocop',   '~> 0.9.1'
   gem 'simplecov', '~> 0.7.1'
   gem 'yardstick', '~> 0.9.6'
 
   platforms :ruby_19, :ruby_20 do
-    gem 'mutant', git: 'https://github.com/mbj/mutant.git'
+    gem 'mutant',          '~> 0.3.0.beta13'
     gem 'yard-spellcheck', '~> 0.1.5'
   end
 
+  platforms :ruby_19 do
+    gem 'json', '~> 1.8.0'
+  end
+
   platforms :rbx do
     gem 'pelusa', '~> 0.2.2'
   end