* Matrix/keymap refactor
- Deleted `KC_KEYMAP` macro
- Renamed `KEYMAP` macro to `LAYOUT_ortho_4x12`
- Default keymap updated to current QMK standards
- #include QMK_KEYBOARD_H
- Refactored from `KC_KEYMAP` to `LAYOUT_ortho_4x12` macro
- `action_get_macro()` deprecated in favor of `process_record_user()`
`rules.mk` *not* updated to include `LAYOUTS = ortho_4x12` because I have no idea if and how that works on a split and/or wireless keyboard.
* readme cleanup: markdown formatting
* Add Configurator support
* added support for ortho_4x12 layout
* Macro and readme updates
Macros updated to use `KC_NO` directly.
Readme updates and cleanup.
