Add: Bash Exploit inventory and remediation tutorial
Change: Reorganize tutorial images

This tutorial has a bunch of images, it makes it hard to manage the
other content so I have moved all the images for this tutorial to a
specific sub directory.
Change: Fix broken image links shorten title
Rename images

Rename images so that they are easily identified and work.
Change: Add note about working with community
Merge pull request #923 from nickanderson/3.6-tutorial/bash_cve

Add: Tutorial for Reporting and Remediation of Security Vulnerabilities