Improved extensibility, customizability, performance

Driver re-drafted from the ground up to remove vestigial code from the initial learning from Wacom's driver, with an increased awareness of supporting other VEIKK tablets. Module parameters and their handling redesigned to do more arithmetic in setup rather than on raw_event, and designed in tandem with the new GUI.

Version 1.1: Basic Configuration Utility and Fixes

Basic command-line configuration utility is created! Includes ability to change tablet orientation, mapping onto section of screen, and mapping raw pressure input to pressure output.

Version 1.0: Completed Driver

Driver is functional! After installation with make; sudo make install, device is plug-and-play. See README.md for more details.