Add in mekanist's keymap. Thanks to MatthewRobo for assisting in creating some of his features (#5335)

keyboards/dztech/dz60rgb/keymaps/mekanist/readme.md

@@ -0,0 +1,34 @@
+# mekanist keymap instructions
+
+## Dev Environment setup (macOS)
+
+1. Install Homebrew by copy pasting the following into a terminal:
+    ```
+    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+    ```
+
+2. Refer to the [QMK macOS Instructions](https://github.com/qmk/qmk_firmware/blob/master/docs/getting_started_build_tools.md#macos) and install the list of tools using the `brew` command in terminal. 
+
+3. While in terminal, issue the following command within the directory you wish to clone qmk_firmware in. 
+
+    ```
+    git clone https://github.com/qmk/qmk_firmware.git
+    ```
+
+## Creating the mekanist dz60rgb firmware file
+
+1. While in the `qmk_firmware` directory, issue the following command
+
+    ```
+    make git-submodule
+    ```
+
+    This will download the chibi-os submoduled needed to create firmware for ARM based boards such as the dz60rgb. 
+
+2. While in the `qmk_firmware` directory, issue the followng command
+
+    ```
+    make dztech/dz60rgb:mekanist
+    ```
+
+    This will result in a file called `dztech_dz60rgb_mekanist.bin` that you can flash onto your board using QMK Toolbox.