added the installation instructions for Ubuntu

README.md

@@ -28,7 +28,20 @@ brew cask install google-chrome
 To install the needed dependencies on Ubuntu:
 
 ```bash
-
+# Install Chrome.
+sudo curl -sS -o - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add
+sudo echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list
+sudo apt-get -y update
+sudo apt-get -y install google-chrome-stable
+
+# Install ChromeDriver.
+CHROME_DRIVER_VERSION=`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE`
+wget -N http://chromedriver.storage.googleapis.com/$CHROME_DRIVER_VERSION/chromedriver_linux64.zip -P ~/
+unzip ~/chromedriver_linux64.zip -d ~/
+rm ~/chromedriver_linux64.zip
+sudo mv -f ~/chromedriver /usr/local/bin/chromedriver
+sudo chown root:root /usr/local/bin/chromedriver
+sudo chmod 0755 /usr/local/bin/chromedriver
 ```
 
 ## Configuration