title: get validations from model
body: <p>How cat I get list of validations defined in model</p>
  
  <p>Example:</p>
  
  <pre><code>class ModelName
    validates_presence_of :field_name
    validates_inclusion_of :sex, :in =&gt; %w(M F)
  end
  </code></pre>
  
  <p>I need Hash like:</p>
  
  <pre><code>{:field_name =&gt; 'required', :sex =&gt; 'Must be in: M, F'}
  </code></pre>