title: Fitnesse/dbFit : columns that are not verified
body: <p>Do you have any ideas if it is possible to create a column that contains only description of a row and is not verified by dbFit. For instance, I have a such table:</p>
  
  <pre><code> !|Query|select 1 as sth from dual|
   |sth|description|
   |1|this rows contains 1|
  </code></pre>
  
  <p>The query returns one column and only first column should be verified. The other one is skipped during verification. </p>
  
  <p>Do you know if it is possible ? right now I receive the error :
       java.lang.Exception: Unknown column description
       at dbfit.fixture.RowSetFixture.findColumn(RowSetFixture.java:40)</p>
  
  <p>Thank you for any help,
  foxrafi</p>