* Refactor layout macro names
Update the names of the layout macros to reflect QMK's desired usage.
- KEYMAP renamed to LAYOUT
- colinta keymap updated accordingly
- KC_KEYMAP renamed to LAYOUT_kc
- mtdjr keymap updated accordingly
* Update xd75.h to use #pragma once include guard
* Update keymaps to use QMK_KEYBOARD_H
* Refactor default keymap
- updated to use layout macro
- remove deprecated action_get_macro function
- add functions from QMK keymap.c template
- process_record_user
- matrix_init_user
- matrix_scan_user
- led_set_user
* Update supporting files
- updated config.h files to use #pragma once include guard
- remove errant QUANTUM_DIR code block
* Rename readme files to fully lowercase filenames
* Restructure keyboard readme
Updated the readme to better align with the current QMK template.
* Bugfixes to supporting files
* include variables and .h files as pp directives
* start layout compilation
* split ergodoxes up
* don't compile all layouts for everything
* might seg fault
* reset layouts variable
* actually reset layouts
* include rules.mk instead
* remove includes from rules.mk
* update variable setting
* load visualizer from path
* adds some more examples
* adds more layouts
* more boards added
* more boards added
* adds documentation for layouts
* use lowercase names for LAYOUT_
* add layout.json files for each layout
* add community folder, default keymaps for layouts
* touch-up default layouts
* touch-up layouts, some keyboard rules.mk
* update documentation for layouts
* fix up serial/i2c switches
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