Added support for Lists (i.e. tags) and moved list- and type- to list/ type/

Unable to merge. Manually changed based on the following commits…

Inspired by nickwynja@b06e768
Moved tagged-, list-, and type- into tag/<x>, list/<x>, and type/<x>

Inspired by dschuetz@eb15c7
Adding support for "Lists" - much like tags, but to be focused more on
plain lists of posts. Also provides a page slug to template for
page-specific templating (like adding a fixed descriptive header to all
"list-list-name" pages).
Added Update_log file length auto-trimming