AndroidStudio: install *.md plugin

It is a common practice to provide a README text file in the root of the project.
The file usually specify:
- project overview
- project dependencies
- how to build the project
- copyrights

It is became the standard to write this file in a MarkDown format README.md

Once you create a new *.md text file the AndroidStudio tells you that it does not recognize the format and to download the plugin.