This plugin is a convenience to make new page templates easier to edit. Otherwise, changes to files in the data pages directory named _template or __template can only be made by those with access to the backend wiki files on the web server.
To use the plugin, simply create a wiki page as normal, including namespace template syntax. Pages named c_template are then applied to all new pages created in that namespace. Pages named i_template are also applied to new pages in sub-namespaces of the current one if no overriding c_template is present.