title: CFSpreadsheet Date formatting issue
body: <p>I'm running ColdFusion 10 locally and running into two issues with a database that was recently converted from Oracle to MSSQL.</p>
  
  <p>What I'm trying to do is output data from the database into a spreadsheet using cfspreadsheet. There are 3 columns in a table and these contain date / timestamps. </p>
  
  <p>Issue #1: The code worked fine prior to the conversion but after the conversion all the date / time stamps appear in scientific notation format. I've tried modifying my CFQUERY with a cast convert, but all this does is show the date / timestamp fields as 'YYYY/MM/DD' instead of my intended format which is 'MM/DD/YYYY HH:MM AM/PM.' When I double click on the cell in excel, I see the correct formatting but by default it shows it as 'YYYY/MM/DD.' Any suggestions here? </p>
  
  <p>Issue #2: If the column or specific cell that is supposed to use the date / time formatting I specified is empty or null, I receive a '' is an invalid date or time string error. </p>
  
  <p>Here is what I am using for the CAST/ CONVERT in my cfquery:</p>
  
  <pre><code>            ,CAST(CONVERT(varchar(20), GYMSTARTDATE, 22) AS datetime) AS GymStartDateTime
          ,CAST(CONVERT(varchar(20), GYMENDDATE, 22) AS datetime) AS GymEndDateTime
  </code></pre>