title: addColumn yii migration position
body: <p>I want to add a column at the seventh place in the table, I am using </p>
  
  <pre><code>$this-&gt;addColumn('table_name','column_name','type'); 
  </code></pre>
  
  <p>adds the column at the end. Is there any way where I can mention the place to add column? Or any after column keyword to add my new column after, for exapmle, password column.
  I have learnt aboout migration from <a href="http://www.yiiframework.com/doc/api/1.1/CDbMigration#addColumn-detail" rel="noreferrer">Yii Doc</a></p>