IDOBO Keyboard Support (75Keys Aluminum Keyboard) (#4401)

* initial commit

* put my name everywhere

* get the switch matrix correct

* add a basic keymap

* use a better LAYOUT macro

* update readme

* Add QMK Configurator support

keyboards/idobo/readme.md

@@ -0,0 +1,17 @@
+# IDOBO
+
+![IDOBO](imgur.com image replace me!)
+
+75Keys Aluminum Mechanical Keyboard.
+
+Firmware here originally appeared on qmkeyboard.cn
+
+Keyboard Maintainer: [MechMerlin](https://github.com/mechmerlin)  
+Hardware Supported: IDOBO PCB
+Hardware Availability: [IDOBO on Massdrop](https://www.massdrop.com/buy/xd75-aluminum-mechanical-keyboard)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make idobo:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).