Update gems

Gemfile

@@ -2,13 +2,13 @@ source 'https://rubygems.org'
 
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '4.2.0'
+gem 'rails', '4.2.4'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0.1'
+gem 'sass-rails', '~> 5.0.4'
 # Use Uglifier as compressor for JavaScript assets
-gem 'uglifier', '~> 2.7.0'
+gem 'uglifier', '~> 2.7.2'
 # Use CoffeeScript for .js.coffee assets and views
 gem 'coffee-rails', '~> 4.1.0'
 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
@@ -19,7 +19,7 @@ gem 'jquery-rails'
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
 gem 'turbolinks'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
-gem 'jbuilder', '~> 2.0'
+gem 'jbuilder', '~> 2.3.1'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0',          group: :doc
 
@@ -29,19 +29,19 @@ gem 'web-console', '~> 2.0', group: :development
 gem 'quiet_assets', group: :development
 
 # Use Coveralls for coverage documentation
-gem 'coveralls', '~> 0.7.2', require: false
+gem 'coveralls', '~> 0.8.2', require: false
 
-gem 'bootstrap-sass', '~> 3.3.1'
+gem 'bootstrap-sass', '~> 3.3.5.1'
 gem 'autoprefixer-rails'
 
-gem 'bh', '~> 1.3.1'
+gem 'bh', '~> 1.3.4'
 
-gem 'will_paginate', '~> 3.0.6'
+gem 'will_paginate', '~> 3.0.7'
 gem 'will_paginate-bootstrap'
 
 gem 'mathjax-rails'
 
-gem 'devise', '~> 3.4.1'
+gem 'devise', '~> 3.5.2'
 gem 'devise-bootstrap-views'
 
 gem 'codemirror-rails'