Prepare Ubuntu for the Python authentication library

Before installing the Python authentication library on Ubuntu, Veracode recommends that you run these commands to prepare the system:

1. Uninstall any system-installed version of pip:

   sudo apt-get remove python-pip

2. Install the latest version of pip:

   sudo easy_install pip

3. Uninstall any system-installed version of HTTPie:

   sudo apt-get purge httpie