Issue 2933 static error/placeholder page tweaks

http://code.google.com/p/otwarchive/issues/detail?id=2933

I have finally figured out what was causing the border on the error pages! #main had the error class, which meant it was taking on the border and shadow from our error flash messages. The border should be no more.

At first, I didn't include the JS for the menus on the error/placeholder pages since the existing versions of these static pages were JS-less, but we have plans to add JS to at least one error page in the future in order to display tweets. So I've gone and added the menu JS.

I removed the Log In link from the header on error/placeholder pages, since (a) you see the same error page regardless of whether you are logged in or out and (b) adding the JS broke the Log In link, and it made more sense to take it out than fix it due to (a).

I also improved the tabbing in the files, so they should be prettier for future editing.