Merge "Security on Rails" book's lunchedin examples into RailsGoat

[Al Snow]

Merge "Security on Rails" book's lunchedin examples into RailsGoat.
We now have permission from publisher. Ask @jasnow for details.

[Al Snow]

• https://www.ebay.com/itm/Security-on-Rails-ExLibrary/273022837869?epid=77901548&hash=item3f916de46d:g:dwIAAOSwax5YpIOw
• https://www.ebay.com/itm/Security-on-Rails/142675474139?epid=77901548&hash=item21381ef6db:g:P04AAOSwZfNacqZc

[Al Snow]

Spring cleaning