anchor.diff:  #	- libgtk-3-0
   #	- libgtk2.0-0-dbg
   RUN apt-get update && \
  -	apt-get install -y libdbus-glib-1-2
  -	apt-get install -y libxrender-dev
  -	apt-get install -y libxcomposite-dev
  -	apt-get install -y libasound-dev
  -	apt-get install -y libgtk-3-0
  +	apt-get install -y libdbus-glib-1-2 && \
  +	apt-get install -y libxrender-dev && \
  +	apt-get install -y libxcomposite-dev && \
  +	apt-get install -y libasound-dev && \
  +	apt-get install -y libgtk-3-0 && \
   	apt-get install -y libgtk2.0-0-dbg
   
   # Download Selenium standalone server (2.49.1).
  -RUN wget http://goo.gl/rQhaxb -P /opt/selenium-server-standalone-2.49.1.jar
  +RUN wget -O selenium-server-standalone-2.49.1.jar http://goo.gl/rQhaxb -P /opt/
   
   # Install PHP 5.
   #
  
positive.code: # composer global require phing/phing
  
  # Install PHPUnit
  RUN wget https://phar.phpunit.de/phpunit.phar
  RUN chmod +x phpunit.phar
  RUN mv phpunit.phar /usr/local/bin/phpunit
  RUN phpunit --version
  
  # Install Supervisor.
  # 
  
negative.code: 	apt-get install -y --force-yes firefox
  
  # Adjust Firefox installation directory.
  RUN chmod -R +x /opt/firefox/
  
  # Install Firefox dependencies.
  #
  