Move gems into development group

Gemfile

@@ -1,6 +1,13 @@
 source :rubygems
 ruby '1.9.3'
 
+gem 'mime-types'
+gem 'rack'
+gem 'puma'
+gem 'rack-rewrite'
+gem 'clogger'
+
+group :development do
   gem 'nanoc'
   gem 'nanoc-cachebuster'
   gem 'redcarpet'
@@ -9,13 +16,9 @@ gem 'rainpress'
   gem 'nokogiri'
   gem 'adsf'
   gem 'builder'
-gem 'mime-types'
-gem 'rack'
-gem 'puma'
-gem 'rack-rewrite'
-gem 'pygments.rb', :git => 'git://github.com/akzhan/pygments.rb.git', :branch => 'rubypython-0.6'
-gem 'clogger'
   gem 'tent-schemas', :git => 'git://github.com/tent/tent-schemas.git', :branch => 'master'
   gem 'tent-client', :git => 'git@github.com:tent/tent-client-ruby.git', :branch => 'master'
   gem 'tentd', :git => 'git@github.com:tent/tentd.git', :branch => 'master'
   gem 'tent-apidoc', :git => 'git@github.com:tent/tent-apidoc.git', :branch => 'master'
+  gem 'pygments.rb', :git => 'git://github.com/akzhan/pygments.rb.git', :branch => 'rubypython-0.6'
+end

output/docs.html

@@ -46,7 +46,7 @@ your data, who has access to it, and what can be done with it.</p>
 
 <h3>API Overview</h3>
 
-<p>Tent uses <a href="http://en.wikipedia.org/wiki/JSON">JSON</a> over HTTP.</p>
+<p>Tent is a social layer over HTTP using <a href="http://en.wikipedia.org/wiki/JSON">JSON</a>.</p>
 
 <p>Requests are authenticated with <a href="http://en.wikipedia.org/wiki/Hash-based_message_authentication_code">HMAC</a>
 signatures, and apps use <a href="http://en.wikipedia.org/wiki/OAuth">OAuth 2</a> to access