Make quote-type consistent

Gemfile

@@ -1,16 +1,16 @@
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
 group :development do
-  gem "shoulda", ">= 0"
-  gem "jeweler", "~> 1.5.1"
-  gem "rcov", ">= 0"
+  gem 'shoulda', '>= 0'
+  gem 'jeweler', '~> 1.5.1'
+  gem 'rcov', '>= 0'
 end
 
 group :test do
   gem 'systemu'
-  gem "rspec"
-  gem "rspec-rails"
-  gem "mongrel", "1.2.0.pre2"
+  gem 'rspec'
+  gem 'rspec-rails'
+  gem 'mongrel', '1.2.0.pre2'
   gem 'capybara'
   gem 'database_cleaner'
   gem 'cucumber-rails'