Update RuboCop to new Gem Version

Update RuboCop to new gem version (0.23.0).
Include New RuboCop file layout specified in [this](rubocop/rubocop#1050) issue.

Update Rakefile to use new RuboCop class definition.
From Rubocop to RuboCop.

Add new .rubocop_todo.yml file following new RuboCop file structure.

Signed-off-by: "Jake Champlin" <jake.champlin.27@gmail.com>

.rubocop.yml

@@ -1,4 +1,4 @@
-inherit_from: rubocop-todo.yml
+inherit_from: .rubocop_todo.yml
 AllCops:
   Include:
     - Berksfile

.rubocop_todo.yml

@@ -0,0 +1,27 @@
+# This configuration was generated by `rubocop --auto-gen-config`
+# on 2014-06-19 11:08:17 -0400 using RuboCop version 0.23.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/DeprecatedClassMethods:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/PerlBackrefs:
+  Enabled: false
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Style/SingleSpaceBeforeFirstArg:
+  Enabled: false

Gemfile

@@ -6,7 +6,7 @@ gem 'berkshelf', '~> 3.0.0.beta'
 group :development do
   gem 'foodcritic', '~> 3.0'
   gem 'license_finder', '~> 0.9.5.1'
-  gem 'rubocop', '~> 0.18.0'
+  gem 'rubocop', '~> 0.23.0'
 end
 
 group :test do

Rakefile

@@ -3,7 +3,7 @@ require 'rspec/core/rake_task'
 require 'rubocop/rake_task'
 
 desc 'Run RuboCop style and lint checks'
-Rubocop::RakeTask.new(:rubocop)
+RuboCop::RakeTask.new(:rubocop)
 
 desc 'Run Foodcritic lint checks'
 FoodCritic::Rake::LintTask.new(:foodcritic) do |t|