Another big batch of updates

This is the biggest set of changes thus far:

Highlights
* Copyright updates to include 2013
* Migration from hidraw to hiddev
* Added support for reporting settings from HID report 11 (currently only supports fan settings) 
* Added Perl script for exporting aerocli ---export data to SNMP
* Added Cacti plugin using the SNMP exported data (sample images can be found here: https://github.com/JinTu/aerotools-ng/wiki/Cacti-Template-Example-Graphs)
* General code cleanup and simplification
* Bugfix to prevent inadvertent printing of spaces in floating point numbers
* Bugfix to fan VRM current reading.