pfSense

Rename of files to better match their position in the memory structure

Use the _title var to make the widget title

Each widget has an include file that already has the required widget
title in a var like $dyn_dns_status_title $carp_status_title etc.
Use that var to set the displayed title of the widget, rather than the
stuff that was capitalizing the file name and then having a list of...

Ignore possible erroneously negative temperatures

It's based on 2 pull requests (#1800 and #1801) by nagyrobi

Move main pfSense content to src/