badgraemer

// Helper functions for a two-dimensional XY matrix of pixels.
// Special credit to Mark Kriegsman
//
// 2014-10-18 - Special version for RGB Shades Kickstarter
//              https://www.kickstarter.com/projects/macetech/rgb-led-shades
//              2014-10-18 - code version 2c (local table, holes are r/w), 
//              by Mark Kriegsman 
//
//              This special 'XY' code lets you program the RGB Shades
//              as a plain 16x5 matrix.