Merge pull request #4464 from rchiossi/master

Ask for confirmation before uninstall

tools/uninstall.sh

+read -r -p "Are you sure you want to remove Oh My Zsh? [y/N] " confirmation
+if ! [[ $confirmation =~ ^[yY]$ ]]
+then
+    echo "Uninstall cancelled"
+    exit
+fi
+
 echo "Removing ~/.oh-my-zsh"
 if [ -d ~/.oh-my-zsh ]
 then