Theme changes in OMB

We're getting pretty close to full wordpress-theme compatibility and swapping, and I had to make some minor changes to the included prologue-theme.

If you grab the latest OMB you will need to have an updated prologue-theme, here is a list of the changes if you need to apply them to your (customized theme)

index.php sidebar.php header.php have all changed, you can see the diffs (red=delete,green=add)