Extending alphabetical sorting

Hi Dan,

I've added alphabetical sorting to tags lists in article/blog post pages (http://momh.fr/tutos/Linux/birthday) and in tags lists in tag pages (http://momh.fr/tag/console).

It works, but I have different behaviors for the tags lists in tag pages between my local WampServer and my OVH server : for WampServer I had to add the sorting in the get_page_data function but for my website, I had to modify the get_pages function.

I'm quite surprised. I may have done something wrong, but do you have any idea to explain that "variation" ?

Thanks :)