Added a page to display buttons and sets

Resolves #912

http://jenkins.buttonweavers.com:8080/job/buttonmen-AdmiralJota/342/

This also involved tweaking the python client a bit, so that should be tested too.
What happens when this exception gets caught?  It tried and failed to set $die, and then later it's going to append it to an array.  Will that blow up on the player?