New device: Dell G5 SE Alienware LED Keyboard

 - 4 region keyboard LED controller (tried to keep controller generic
   for other setups as well)
 - Support for Static, Flashing, Morph, Spectrum Cycle, Rainbow Wave,
   and Breathing modes
 - Implemented rate limiting for sending reports since the controller
   crashes if too many reports are sent too quickly. Also implemented
   functionality to prevent sending frivolous update requests
 - Implemented support for setting mode, color, tempo, and period
   independently for each zone (not fully exposed in UI). Morph mode
   exposes 2 colors per zone.

Commit amended for code style by Adam Honse <calcprogrammer1@gmail.com>

Author: gemarcano