rearranged Gemfile to follow new bundler style

Gemfile

@@ -3,18 +3,18 @@ source "http://gemcutter.org"
 gem 'sinatra',        '>= 0.9.4'
 gem 'warden',         '>= 0.5.0'
 
-gem 'rake',                         :only => :testing
-gem 'jeweler',                      :only => :testing
-gem 'bundler',                      :only => :testing
-gem 'rspec',          '~> 1.2.9',   :only => :testing, :require_as => 'spec'
-gem 'yard',                         :only => :testing
-gem 'rack-test',      '~> 0.5.0',   :only => :testing, :require_as => 'rack/test'
-gem 'rcov',                         :only => :testing
+group :test do
+  gem 'rake'
+  gem 'jeweler'
+  gem 'bundler'
+  gem 'rspec',          '~> 1.2.9', :require => 'spec'
+  gem 'yard'
+  gem 'rack-test',      '~> 0.5.0', :require => 'rack/test'
+  gem 'rcov'
 
-gem 'do_sqlite3',     '~> 0.10.0',  :only => :testing
-gem 'dm-core',        '~> 0.10.1',  :only => :testing
-gem 'bcrypt-ruby',                  :only => :testing, :require_as => 'bcrypt'
-gem 'haml',                         :only => :testing
-gem 'rack-flash',                   :only => :testing, :require_as => 'rack/flash'
-
-disable_system_gems
+  gem 'do_sqlite3',     '~> 0.10.0'
+  gem 'dm-core',        '~> 0.10.1'
+  gem 'bcrypt-ruby',    :require => 'bcrypt'
+  gem 'haml'
+  gem 'rack-flash',     :require => 'rack/flash'
+end