Allow use from relative path

There are in fact two changes:
1. Allow the blog to be in a relative path - as opposed to the root directory.
2. The path referencing system didn't work on my server - not sure why. So changed all access references from:
index.php/edit/apost
to:
index.php?edit=apost

Extra Info: Whenever the first form is used, the generated html loads without any of the CSS rules being applied. I'm using Linux Mint with an Apache server. The second form works beautifully. I'm at a loss to explain as I really like the look of the first form. I'm not sure whether $_GET being a super-global has subtly changed since when the original version of this source was written.