New: VSCode and Calva extension install guide

Using new tabbed format to separate the Operating System specific information.

development-environment/install-guides/vscode-calva.md

@@ -0,0 +1,80 @@
+# Microsoft VSCode and Calva extension
+
+VS Code supports Clojure and ClojureScript development through an extension called [Calva](https://marketplace.visualstudio.com/items?itemName=cospaia.clojure4vscode).  A Clojure REPL is run via Leiningen first, then connected to from VSCode.
+
+![VSCode Calva extension for Clojure development](https://github.com/BetterThanTomorrow/calva/raw/master/assets/howto/evaluate.gif)
+
+## Install VS Code
+
+{% tabs first="Debian/Ubuntu", second="MacOSX", third="RedHat", forth="Windows" %}
+
+{% content "first" %}
+[Download the `.deb` file](https://code.visualstudio.com/)
+
+Open (double click) the file.  The Ubuntu software studio will open.  Click the Install button.
+
+[![VSCode Install on Ubuntu](/images/vscode-install-ubuntu-software.png)](/images/vscode-install-ubuntu-software.png)
+
+Enter your password when prompted to install the software.
+
+Close the Ubuntu Software app once the install has finished.
+
+[Reference: VSCode on Linux](https://code.visualstudio.com/docs/setup/linux)
+
+### Running VSCode
+
+To run VSCode, press the `Super` key and type `code`, or open a terminal and type the command `code`.
+
+
+{% content "second" %}
+
+[Download the `.zip` file](https://code.visualstudio.com/)
+
+Double-click on the downloaded archive to expand the contents.
+
+Drag `Visual Studio Code.app` to the `Applications` folder, making it available in the Launchpad.
+
+Add VS Code to your Dock by right-clicking on the icon and choosing `Options, Keep in Dock`.
+
+[Reference: VSCode on MacOSX](https://code.visualstudio.com/docs/setup/mac)
+
+### Running VSCode
+
+Launch VSCode from the Dock, or in a command line terminal, type `code`.
+
+
+{% content "third" %}
+[Download the `.rpm` file](https://code.visualstudio.com/)
+
+Open (double click) the file.  The Ubuntu software studio will open.  Click the Install button.
+
+### Running VSCode
+
+To run VSCode, press the `Super` key and type `code`, or open a terminal and type the command `code`.
+
+[Reference: VSCode on Linux](https://code.visualstudio.com/docs/setup/linux)
+
+{% content "forth" %}
+
+[Download the Windows Installer](https://code.visualstudio.com/)
+
+Run the installer which should have a name similar to `VSCodeUserSetup-{version}.exe`.
+
+VS Code is installed under `C:\users\{username}\AppData\Local\Programs\Microsoft VS Code`.
+
+[Reference: VSCode on Windows](https://code.visualstudio.com/docs/setup/windows)
+
+### Running VSCode
+
+Open the Start menu and type `code`.  Click on the VSCode icon to start.
+
+
+## Install Calva extension
+
+Launch VS Code Quick Open, `Ctrl+P`, paste the following command, and press enter.
+
+```
+ext install cospaia.clojure4vscode
+```
+
+[Reference: VSCode Extension Marketplace](https://code.visualstudio.com/docs/editor/extension-gallery)