* kbd67/mkiirgb - allow disabling rgb matrix
wrap rgb matrix funs in defines
* kbd67mkiirgb - changes per review
remove kb funcs that just call the user version. what's left is all rgb
matrix stuff so we can just wrap the whole file.
* move kbd67mkiirgb into kbd67 directory as mkiirgb
* rename files
* rename LAYOUT to LAYOUT_65_ansi_blocker
* add support for default layout
* update readme for new build target
* update parent readme with the fourth variant
