Mod rewrite 2

Hi Dave,

Well, this took me a while to get back to!

The .htaccess file got more complex to handle external stylesheets per issue #78, and then I found I could simplify it further. I also added comments in htaccess to help clarify expected URL structures.

I also simplified the logic detecting whether a CSS file was being loaded (number or external URL). Some of this is necessary for the mod_rewrite changes, some perhaps just being tidy.

While doing this, I did have some questions:

1) Would it be reasonable to treat all external CSS references that start w/ "**cssfile**=blah.css" as legacy? We could be using "**css**=blah.css" as the URL for using the current HTML. I realized that all of the links @ http://www.mezzoblue.com/zengarden/alldesigns/others/, for example, would really benefit from being pointed directly at the legacy HTML.

2) While testing translated pages, I realized we still have a folder full of old translation material. I wondered whether any changes to make those files more accessible made sense—for example if someone is looking at http://csszengarden.com/tr/indonesian/ they would see English. Would it be at all useful to, I dunno, show an Indonesian speaker that much work <a href="http://csszengarden.com/tr/indonesian/old.php">has already been done</a>, and just a little more needs doing? Thorny, but I thought I'd ask.

Let me know if you see anything else, and I hope this is helpful!