Add a README

README.md

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+<h1 align="center">PHP CLI Demo</h1>
+
+<p align="center">PHP command-line tool demonstration</p>
+
+<p align="center">
+    <img alt="Preview" src="/art/preview.png">
+	<p align="center">
+		<a href="//packagist.org/packages/mdeherder/php-cli-demo"><img alt="Latest Stable Version" src="https://poser.pugx.org/mdeherder/php-cli-demo/v"></a>
+		<a href="//packagist.org/packages/mdeherder/php-cli-demo"><img alt="License" src="https://poser.pugx.org/mdeherder/php-cli-demo/license"></a>
+	</p>
+</p>
+
+## Instal
+
+This CLI application is a small game (« Rreview your multiplication tables ») written in PHP and is installed using [Composer](https://getcomposer.org):
+
+```
+composer global require mdeherder/php-cli-demo
+```
+
+Make sure the `...composer/vendor/bin` directory is in your system's `PATH`.
+
+## Use
+
+All you need to do is call the `tdm` command to start the game:
+
+```
+demo tdm ( Use --help or -h to see more options )
+```
+
+## Update
+
+```
+composer global update mdeherder/php-cli-demo
+```
+
+## Delete
+
+```
+composer global remove mdeherder/php-cli-demo
+```