Author: Ahmad Khayyat (akhayyat@gmail.com)
A Pelican plugin that adds a page_order attribute to all pages
if one is not defined. Allows your templates to sort pages as follows:
{% for p in PAGES|sort(attribute='page_order') %}Without this plugin, to be able to use the line above in your
templates, you would have to define the page_order attribute in all
pages. This plugin sets the value of this attribute to a default value
of 100, unless a DEFAULT_PAGE_ORDER setting is defined.
The page_order attribute is cast to an int, so only use numeric
values. This is to have a value of 11 be greater than 2.