If the order is by date and some pages have the same date, only one will
be added to the array because it uses the date as the key.
By adding an auto-incrementing id the key is guaranteed to be unique.
[New] Added ability to order pages by "alpha" or "date" (asc or desc)
[New] Added prev_page, current_page, next_page and is_front_page
template vars
[New] Added "Author" and "Date" title meta fields
[Changed] Added "twig_config" to settings
[Changed] Updated documentation
[Fixed] Query string 404 bug