title: acts-as-taggable-on context names plural or singular?
body: <p>Is it correct to assume that act-as-taggable-on context names must be plural? "skills" vs "skill"? The documentation is not explicit about the naming conventions.</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    acts_as_taggable
    acts_as_taggable_on :*skills*, :interests
  end
  
  @user = User.new(:name =&gt; "Bobby")
  @user.tag_list = "awesome, slick, hefty"  
  @user.skill_list = "joking, clowning, boxing" 
  
  @user.tags # =&gt; [&lt;Tag name:"awesome"&gt;,&lt;Tag name:"slick"&gt;,&lt;Tag name:"hefty"&gt;]
  @user.skills # =&gt; [&lt;Tag name:"joking"&gt;,&lt;Tag name:"clowning"&gt;,&lt;Tag name:"boxing"&gt;]
  </code></pre>