Updated Rubocop to latest version

Gemfile

@@ -261,7 +261,7 @@ group :development, :test do
   gem 'spring-commands-spinach',  '~> 1.0.0'
   gem 'spring-commands-teaspoon', '~> 0.0.2'
 
-  gem 'rubocop',  '~> 0.28.0',  require: false
+  gem 'rubocop', '~> 0.35.0', require: false
   gem 'coveralls',  '~> 0.8.2', require: false
   gem 'simplecov', '~> 0.10.0', require: false
   gem 'flog', require: false

Gemfile.lock

@@ -513,7 +513,7 @@ GEM
       multi_json (~> 1.0)
       websocket-driver (>= 0.2.0)
     posix-spawn (0.3.11)
-    powerpack (0.0.9)
+    powerpack (0.1.1)
     pry (0.10.3)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -637,12 +637,13 @@ GEM
       rspec-mocks (~> 3.3.0)
       rspec-support (~> 3.3.0)
     rspec-support (3.3.0)
-    rubocop (0.28.0)
+    rubocop (0.35.1)
       astrolabe (~> 1.3)
-      parser (>= 2.2.0.pre.7, < 3.0)
-      powerpack (~> 0.0.6)
+      parser (>= 2.2.3.0, < 3.0)
+      powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
-      ruby-progressbar (~> 1.4)
+      ruby-progressbar (~> 1.7)
+      tins (<= 1.6.0)
     ruby-fogbugz (0.2.1)
       crack (~> 0.4)
     ruby-progressbar (1.7.5)
@@ -945,7 +946,7 @@ DEPENDENCIES
   rouge (~> 1.10.1)
   rqrcode-rails3 (~> 0.1.7)
   rspec-rails (~> 3.3.0)
-  rubocop (~> 0.28.0)
+  rubocop (~> 0.35.0)
   ruby-fogbugz (~> 0.2.1)
   sanitize (~> 2.0)
   sass-rails (~> 4.0.5)