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

keyboards/ergodox_infinity/readme.md

@@ -0,0 +1,45 @@
+# ErgoDox Infinity
+
+The Infinity is two completely independent keyboards, and needs to be flashed
+for the left and right halves seperately.  To flash them:
+
+  - Build the firmware with `make infinity-keymapname`
+
+  - Plug in the left hand keyboard only.
+
+  - Press the program button (back of keyboard, above thumb pad).
+
+  - Install the firmware with `sudo make infinity-keymapname-dfu-util`
+
+  - Build right hand firmware with `make infinity-keymapname MASTER=right`
+
+  - Plug in the right hand keyboard only.
+
+  - Press the program button (back of keyboard, above thumb pad).
+
+  - Install the firmware with `sudo make infinity-keymapname-dfu-util MASTER=right`
+
+More information on the Infinity firmware is available in the [TMK/chibios for
+Input Club Infinity Ergodox](https://github.com/fredizzimo/infinity_ergodox/blob/master/README.md)
+
+## Infinity Master/Two Halves
+
+The Infinity is two completely independent keyboards, that can connect together.
+You have a few options in how you flash the firmware:
+
+- Flash the left half, rebuild the firmware with "MASTER=right" and then flash
+  the right half.  This allows you to plug in either half directly to the
+  computer and is what the above instructions do.
+
+- Flash the left half, then flash the same firmware on the right.  This only
+  works when the left half is plugged directly to the computer and the keymap
+  is mirrored.  It saves the small extra step of rebuilding with
+  "MASTER=right".
+
+- The same as the previous one but with "MASTER=right" when you build the
+  firmware, then flash the same firmware to both halves.  You just have to
+  directly connect the right half to the computer.
+
+- For minor changes such as changing only the keymap without having updated
+  any part of the firmware code itself, you can program only the MASTER half.
+  It is safest to program both halves though.