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/tkuichooseyou/README.md

@@ -0,0 +1,13 @@
+# Based on Default OSX
+I'm a vim and OSX user
+
+- Moved Hyper and Meh up, replaced with CMD
+  - Because I'm used to having symmetrical CMD keys on both hands
+- Changed left delete to Tab to match OSX
+- Changed left Backspace to CTRL/ESC for vim
+- Changed top left and top right arrow to `CMD+{` and `CMD+}`
+  - Useful for switching tabs in Safari, Xcode, etc.
+- Remove the Ctrl from Z and /
+- Remove CMD from right quote
+- Changed right Alt to Delete
+