* handwired/fivethirteen: refactor
- Layout macro KEYMAP renamed to LAYOUT
- Default keymap
- now uses #include QMK_KEYBOARD_H
- Removed redundant KC_TRNS definition
- Removed deprecated fn_actions and action_get_macro functions.
* handwired/fivethirteen: Configurator support
* handwired/fivethirteen: readme cleanup
Restructured readme file to be closer to current QMK template.
Couldn't find a photo of an assembled fivethirteen, so deleted the
reference to the photograph.
Renamed to readme.md
