Remove dup from header_row cell

This fixes #452 (and #413?) - Table header styling for the second page

The diff is really messy because of my white space removal. Let me know if you'd like me to resubmit without the whitespace changes. Fix is on line 292

:satisfied:

![Headers Yay!](https://f.cloud.github.com/assets/40662/238113/8b156620-882b-11e2-9547-b6d331648e1f.png)