Creates a layouts/ folder for keymaps shared between keyboards (#1609)

* 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

1 files changed, 70 insertions, 0 deletions

diff --git a/layouts/community/ergodox/dvorak_emacs/readme.md b/layouts/community/ergodox/dvorak_emacs/readme.md
new file mode 100644
index 000000000..a3fc34afe
--- /dev/null
+++ b/layouts/community/ergodox/dvorak_emacs/readme.md
@@ -0,0 +1,70 @@
+# Ergodox Dvorak Layout with emacs binding in mind
+ * Control & Alt key on the thumbs (activated if pressed with another key).
+ * In the same way, "U" and "R" are the shift modifier if pressed with another key.
+ * "I" and "D" set the layer 1 for the auxiliary keys if pressed with another key.
+ * Software layout set to english.
+
+## Keymap Layers
+ - L0: dvorak with some customizations (see layout below)
+ - L1: auxiliary keys (includes function keys, numpad...)
+
+
+### Keymap 0: Base layer
+Keys with double values (like U/LSft) correspond to the 'tapped' key and the 'held' key, respectively
+
+<pre><code>
+
+,--------------------------------------------------.           ,--------------------------------------------------.
+|        |   1  |   2  |   3  |   4  |   5  |  Esc |           |  Esc |   6  |   7  |   8  |   9  |   0  |   =    |
+|--------+------+------+------+------+-------------|           |------+------+------+------+------+------+--------|
+|   ~    |  '   |   ,  |   .  |   P  |   Y  |   [  |           |   ]  |   F  |   G  |   C  |   H  |   L  |   /    |
+|--------+------+------+------+------+------|   {  |           |   }  |------+------+------+------+------+--------|
+|  Tab   |   A  |   O  |   E  |U/LSft| I/L1 |------|           |------|  D/L1|R/RSft|   T  |   N  |   S  |   -    |
+|--------+------+------+------+------+------| LGUI |           | LGUI |------+------+------+------+------+--------|
+| {/LSft |   ;  |   Q  |   J  |   K  |   X  |      |           |      |   B  |   M  |   W  |   V  |   Z  | }/RSft |
+`--------+------+------+------+------+-------------'           `-------------+------+------+------+------+--------'
+  |      |      |      |      | ~L1  |                                       | ~L1  |      |      |   \  |      |
+  `----------------------------------'                                       `----------------------------------'
+                                       ,-------------.       ,-------------.
+                                       | HOME |  END |       | LEFT | RIGHT|
+                                ,------|------|------|       |------+--------+------.
+                                | BSPC |  DEL | PGUP |       |  UP  | SPACE  |RETURN|
+                                |  /   |  /   |------|       |------|   /    |  /   |
+                                | LCTL | LALT |PGDWN |       | DOWN | LALT   | LCTL |
+                                `--------------------'       `----------------------'
+
+</pre></code>
+
+### Keymap 1: Aux layer
+
+<pre><code>
+
+,--------------------------------------------------.           ,--------------------------------------------------.
+|  VolUp |      |      |      |      |      | SLEEP            | PWR  |      |      |      |      |      |        |
+|--------+------+------+------+------+-------------|           |------+------+------+------+------+------+--------|
+|  VolDn |  F1  |  F2  |  F3  |  F4  |      |      |           |      |      |   7  |   8  |   9  |   *  |        |
+|--------+------+------+------+------+------|      |           |      |------+------+------+------+------+--------|
+|        |  F5  |  F6  |  F7  |  F8  | TRANS|------|           |------|TRANS |   4  |   5  |   6  |   +  |        |
+|--------+------+------+------+------+------|      |           |PSCR  |------+------+------+------+------+--------|
+|  TRANS |  F9  |  F10 |  F11 |  F12 |      |      |           |      |      |   1  |   2  |   3  |   /  |  TRANS |
+`--------+------+------+------+------+-------------'           `-------------+------+------+------+------+--------'
+  |CTRL-S|CTRL-Z|CTRL-X|CTRL-C| TRANS|                                       | TRANS|    . |   0  |   =  |      |
+  `----------------------------------'                                       `----------------------------------'
+                                       ,-------------.       ,-------------.
+                                       | TRANS| TRANS|       | TRANS| TRANS|
+                                ,------|------|------|       |------+------+------.
+                                |      |      | TRANS|       | TRANS|      |      |
+                                |TRANS |TRANS |------|       |------| TRANS| TRANS|
+                                |      |      | TRANS|       | TRANS|      |      |
+                                `--------------------'       `--------------------'
+
+</pre></code>
+
+
+
+## Generation of .hex file
+> In the "qmk_firmware/keyboards/ergodox" directory.
+
+> Execute "make dvorak_emacs". Then the hex file "ergodox_ez_dvorak_emacs.hex" is in the root directory : "qmk_firmware".
+
+> Flash with `teensy_loader` binary