Keymap: Finex Redox keymap (#4418)

* Added FiNeX custom Redox Layout, first commit.

* updated readme

* removed old code

keyboards/redox/keymaps/finex/readme.md

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+# Customized keymap for Redox by Leonardo (FiNeX) Finetti.
+
+
+## Features
+
+- Enabled USE_SERIAL for Falba.Tech Redox keyboards.
+- PC Layouts: QWERTY, Colemak Mod DH-MK.
+- Mac Layouts: same as above with CTRL-GUI keys inverted on the bottom row.
+- Added redundant "Space", "Esc" and "Ctrl" keys.
+- Added macro to print "->" and "=>" strings.
+- Added macro to print ":-( " and ":-) " strings.
+- Added more arrows.
+- Added "(" and ")" on Shifts keys.
+- Added Shift on both ) "Enter" keys.
+- Removed Mouse and media support.
+- Added missing "Print Screen" and "Menu" keys.
+- Added missing "F11" and "F12" keys.
+
+
+## Layers
+
+This keymap use the default one with some minor improvements to suit my needs.
+
+## Changelog
+
+- 2018/11/13
+  First public release
+
+
+## TODO
+
+- Bring back mouse and multimedia keys.
+- Add default Colemak Mod DH layout.
+- Improve top corner keys.
+- Improve bottom row keys (mostly KC_BSLS and KC_QUOT).