Initial structure for Ergodox as subprojects

Only the EZ default keymaps compiles at the moment though.

keyboards/ergodox/keymaps/romanzolotarev-norman-osx/readme.md

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+# Roman's Layout
+
+There is only one layer based on [Norman layout](https://normanlayout.info/).
+
+Looking for multiple-layer layouts?
+
+- [Symbols, arrows, plover, HJKL arrows](../romanzolotarev-norman-plover-osx-hjkl/)
+- [Same with IJKL arrows](../romanzolotarev-norman-plover-osx/)
+
+[![keyboard-layout](romanzolotarev-norman-osx.png)](http://www.keyboard-layout-editor.com/#/gists/9e89d54f1ea6eeeb7dab1b2d19d28195)
+
+## Functional Keys
+
+- Tap `F1` to mute microphone via [Shush](http://mizage.com/shush/).
+- Tap `F2` to copy screenshot to the clipboard.
+- Hold `SHIFT` and tap `F2` to save screenshot as a file.
+- Tap `F3`, `F4`, `F5`, `F6` to resize a window via [Divvy](http://mizage.com/divvy/).
+
+## CTRL/ESC
+
+CTRL and ESC are frequently used in Vim.
+
+- Tap `CTRL/ESC` to send `ESC`.
+- Hold `CTRL/ESC` to use as `CTRL`.
+
+## Activate N-rollover
+
+- Hold left `SHIFT` and right `SHIRT` and then tap `N`.