Upgraded from Rails 4.0 to 4.2

Gemfile

@@ -1,19 +1,19 @@
 source 'https://rubygems.org'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '4.0.0'
+gem 'rails', '4.2.0'
 
 # Use sqlite3 as the database for Active Record
 # gem 'sqlite3'
 
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 4.0.0'
+gem 'sass-rails', '~> 5.0'
 
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 
 # Use CoffeeScript for .js.coffee assets and views
-gem 'coffee-rails', '~> 4.0.0'
+gem 'coffee-rails', '~> 4.1.0'
 
 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
 # gem 'therubyracer', platforms: :ruby
@@ -26,11 +26,11 @@ gem 'jquery-rails'
 #gem 'turbolinks'
 
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
-gem 'jbuilder', '~> 1.2'
+gem 'jbuilder', '~> 2.0'
 
 group :doc do
   # bundle exec rake doc:rails generates the API under doc/api.
-  gem 'sdoc', require: false
+  gem 'sdoc', '~> 0.4.0'
 end
 
 # Use ActiveModel has_secure_password
@@ -53,14 +53,19 @@ group :development do
   gem "binding_of_caller"
 
   # Chrome Rails debugging app
-  gem 'meta_request'
+  #gem 'meta_request'
 end
 
-# Twitter Bootstrap template
-#gem 'bootstrap-sass'
-#gem 'anjlab-bootstrap-rails', '>= 3.0.0.0'
-# gem 'anjlab-bootstrap-rails', :require => 'bootstrap-rails',
-                              # :github => 'anjlab/bootstrap-rails'
+group :development, :test do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'byebug'
+
+  # Access an IRB console on exception pages or by using <%= console %> in views
+  gem 'web-console', '~> 2.0'
+
+  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
+  gem 'spring'
+end
 
 # Zurb Foundation
 gem 'foundation-rails'