Commented Gemfile, remove redundant lines
diff --git a/Gemfile b/Gemfile
index 9710ff6..8ea606c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,11 +1,11 @@
 source 'https://rubygems.org'
 ruby '2.2.1'
 
-# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '4.2.3'
 
+# Application server
 gem 'puma'
-
+# Authentication and authorization
 gem 'devise'
 gem 'omniauth-facebook'
 gem 'omniauth-google-oauth2'
@@ -17,61 +17,61 @@
 gem 'uglifier', '>= 1.3.0'
 # Use CoffeeScript for .coffee assets and views
 gem 'coffee-rails', '~> 4.1.0'
-# See https://github.com/rails/execjs#readme for more supported runtimes
-# gem 'therubyracer', platforms: :ruby
-
+# Slim is a template language
 gem 'slim'
 gem 'slim-rails'
-
+# Bower support for Rails projects
 gem 'bower-rails'
-
 # Use jquery as the JavaScript library
 gem 'jquery-rails'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0', group: :doc
-
+# Cloud storage
 gem 'carrierwave'
 gem 'fog'
-
+# Decorator for Rails models
 gem 'draper'
-
+# A Ruby library for working with Research Object Bundle files
 gem 'ro-bundle'
+# A Ruby library to aid the interaction with Taverna 2 workflows
 gem 'taverna-t2flow'
+# A simple interface to working with ZIP archives
 gem 'archive-zip'
+# Paginator
 gem 'kaminari'
-# Use ActiveModel has_secure_password
-# gem 'bcrypt', '~> 3.1.7'
-
-# Use Unicorn as the app server
-# gem 'unicorn'
-
-# Use Capistrano for deployment
-# gem 'capistrano-rails', group: :development
 
 group :development, :test do
+  # More useful error page
   gem 'better_errors'
   gem 'binding_of_caller'
+  # Turns off the Rails asset pipeline log
   gem 'quiet_assets'
-
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
-
+  # rspec-rails is a testing framework for Rails
   gem 'rspec-rails'
+  # A library for setting up Ruby objects as test data
   gem 'factory_girl_rails'
+  # A minimalist's tiny and ultra-fast database cleaner
   gem 'database_rewinder'
+  # Acceptance test framework for web applications
   gem 'capybara'
   gem 'capybara-webkit'
   gem 'capybara-screenshot'
+  # Headless is the Ruby interface for Xvfb. It allows you to create a headless display straight from Ruby code
   gem 'headless'
+  # A library for generating fake data such as names, addresses, and phone numbers.
   gem 'faker'
 end
 
 group :test do
+  # Collects test coverage data from your Ruby test suite and sends it to Code Climate's hosted, automated code review service
   gem 'codeclimate-test-reporter'
 end
 
 group :production do
+  # Heroku gem, what makes running your Rails app easier
   gem 'rails_12factor'
 end