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

layouts/community/ergodox/videck/readme.md

@@ -0,0 +1,26 @@
+ViDeck keymap for ErgoDox
+=========================
+
+This is a QWERTY layout based on the US layout, where Vi functionality has been
+especially considered.
+
+# Features
+* Mouse movements using the Vi movement keys.
+* Vi movement keys doubling as arrow keys.
+* Shift lock using double tap.
+* A coder's modifier key for easy input of parenthesis.
+* Acess to the escape key using either thumb.
+* Reasonably accessible Scroll Lock key (useful if you, like me, want to switch
+  to a non-US layout once in a while in X).
+
+# Missing keys
+* Caps Lock (shift lock is used instead).
+* Pause/Break.
+* Print Screen.
+
+# LEDs
+* Shift lock is indicated using first LED.
+* Arrow keys layer is indicated using second LED.
+* Mouse keys layer is indicated using third LED.
+
+![videck.png](https://i.imgur.com/kw0CwuB.png)