Created Setting up Drush (markdown)

Setting-up-Drush.md

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+In this guide we are installing Drush, the command line interface of Drupal. According the the developers:
+
+> Drush is a command line shell and scripting interface for Drupal, a veritable Swiss Army knife designed to make life easier for those of us who spend some of our working hours hacking away at the command prompt.
+
+## Prerequisites
+
+* A [[Drupal setup|Setting up Drupal 7]]
+
+## Install dependencies
+
+Run the commands as the *ubuntu* user:
+
+```
+$ sudo apt -y install curl unzip
+$ curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
+```
+
+## Install Drush
+
+Switch to the *webadmin* user:
+
+```
+$ sudo su - webadmin
+```
+
+Install Drush:
+
+```
+$ cd cms/
+$ composer require drush/drush
+```
+
+You can run *drush* to check the status of your Drupal install, with:
+
+```
+$ ./vendor/bin/drush status
+```
+
+References
+----------
+* http://docs.drush.org/en/master/
+* http://www.bravo-kernel.com/2014/08/how-to-install-composer-on-debian/