This includes two scenarios - the work_info one mentioned in the
tutorials, but also one allowing downloading of source code, which may
belong somewhere else as I haven't worked through all the tutorials yet.
Adding Capybara to verify replay-ability of hacking vulnerabilities. I
imagine these may want to be kept on a different branch for QA and
educational purposes, but not distributed with master when forked.
This commit also includes demonstrating the SQL Injection vulnerability.
chrismo