PREVENT_STUCK_MODIFIERS
* Remove chording as it is not documented, not used, and needs work. * Make Leader Key an optional feature. * Switch from `PREVENT_STUCK_MODIFIERS` to `STRICT_LAYER_RELEASE` * Remove `#define PREVENT_STUCK_MODIFIERS` from keymaps.
* Added Zlant support * Uses LAYOUT and identifies individual layers * Removed deprecated =? usage on rules.mk * Adds readme for Zlant keyboard and its default layout * Fixed LAYOUT constant * Minor zlant readme formatting fix